HVAC Decoder
HVAC Tonnage From Model Number
Pick the brand or paste any AC, heat pump, or mini split model number and get the nominal tonnage and BTU/h, plus the SEER class and refrigerant generation where a maker sheet prints them. 15 of the 15 brand schemes behind it are backed by a manufacturer document we fetched and quoted, each named with the document it was read from and the date it was fetched.
Field brief
Capacity code residential AC and heat pump model numbers embed nominal capacity as BTU/h divided by 1,000, in a 2 or 3 digit code divisible by 6: 018 = 1.5 tons, 024 = 2, 030 = 2.5, 036 = 3, 042 = 3.5, 048 = 4, 060 = 5 tons. Divide the code by 12 to get tons. code ÷ 12
Off the ladder some manufacturers also print codes that this division gets wrong, and their own published tables govern instead: Trane prints 19, 25, 31, 37, 43, 49 and 61, Lennox prints 041, 047 and 059, and Goodman and Amana print 019, 025, 031, 037 and 043. table governs
Mini splits print the BTU class directly: 09, 12, 15, 18, 24, 30, 36. Those are the classes the sheets held here print; this tool also reads the larger classes 42, 48, 60 on the shared ladder. BTU class, printed
Starting the decoder. The capacity tables below this box are already loaded, so you can read your code off them now.
Know the brand? These 5 have a dedicated page built from that manufacturer's own nomenclature document, naming the document and the date it was fetched: Carrier, Trane, Lennox, Goodman and Amana.
Nominal capacity from a model number is a nameplate convention, not a measurement. Actual delivered capacity depends on the matched indoor unit, line set, airflow, and conditions. Always confirm against the data plate's BTU/h rating and the AHRI certificate for the matched system.
Checked against the AHRI Certification Directory before it shipped: 13 of 13 brand families agreed, none disagreed. We did not read these capacity codes off the directory. The engine was built from the manufacturers' own nomenclature, then asked to predict what an independent certification body would say, and checked against it. The 2 families not counted (LG multi-split and Nortek/Nordyne) were searched and carry no certified capacity there, so there was nothing to check.
Capacity Code Reference Table
| Model code | Nominal BTU/h | Tons |
|---|---|---|
| 018 | 18,000 | 1.5 |
| 024 | 24,000 | 2 |
| 030 | 30,000 | 2.5 |
| 036 | 36,000 | 3 |
| 042 | 42,000 | 3.5 |
| 048 | 48,000 | 4 |
| 060 | 60,000 | 5 |
Mini splits use the same BTU/1000 idea but print the class directly, including sizes that are not divisible by 6: 09, 12, 15, 18, 24, 30, 36 (9,000 to 36,000 BTU/h, 0.75 to 3 tons). One ton of cooling = 12,000 BTU/h, so any code on the two tables above divided by 12 is the tonnage. That division is not universal: several brands publish capacity codes it gets wrong, and this tool reads those from the manufacturer's own table instead. The brands with a dedicated page below print them as follows. Trane prints 19 = 1.5 tons, 25 = 2 tons, 31 = 2.5 tons, 37 = 3 tons, 43 = 3.5 tons, 49 = 4 tons and 61 = 5 tons; Lennox prints 041 = 3.5 tons, 047 = 4 tons and 059 = 5 tons; Goodman and Amana print 019 = 1.5 tons, 025 = 2 tons, 031 = 2.5 tons, 037 = 3 tons and 043 = 3.5 tons. Payne prints 037 as 3 tons on its 16 SEER sheet. Each of those is a code where dividing by 12 lands between two real sizes, so the manufacturer's printed tonnage is the only correct answer. Read each scheme's own source line below rather than treating this list as complete.
Brand Scheme Reference
15 of these 15 schemes are backed by a manufacturer document we fetched and quoted, named in the sources below. Read each scheme's own source line belowfor which it is: the Confidence column rates the SOURCE the rule rests on. High means a manufacturer nomenclature document establishes the capacity position; Medium means the sourcing is thinner, or the scheme is document-backed without a fixed capacity position and its own source line says so; Convention means no manufacturer decode chart backs the rule at all. Where a source conflict or single-sourced claim exists, this decoder either drops the claim or publishes it at reduced confidence with the gap named, rather than guessing. Allied's 4AC family keeps an estimated capacity: the 4AC14 guide we hold prints its capacity field as one worked example rather than a list of sizes, so 4AC14 is read by that example's rule as an estimate, and the other 4AC series, which no Allied legend we hold covers, by the shared pattern. The ICP series prefix key is verified against ICP's own model number identification guide, which shows that ICP gives one digit-1 letter to several of its brands at once, so this decoder publishes the product line and refuses to name a maker from the model number.
| Brands | Where the capacity code sits | Also encoded | Confidence | Source |
|---|---|---|---|---|
| Trane, American Standard | Positions 7-8 are the nominal capacity code (4TTR4036N1000 = 36 = 3 tons). Position 6 is the field-connection digit, not part of the capacity. Trane also ships odd codes that are not the code divided by 12: 19 is 1.5 tons, 25 is 2, 31 is 2.5, 37 is 3, 43 is 3.5, 49 is 4 and 61 is 5. RunTru by Trane (A5AC, A5HP, A5HL) carries a three digit Nominal Capacity at positions 6-8, read off the handbook's listed product rows for its series. | Position 1 = refrigerant (2 = R-22, 4 = R-410A, 5 = R-454B), position 5 = the efficiency digit (3 = 13, 4 = 14, 5 = 15, 6 = 16, 8 = 18, 9 = 19 in every R-410A Trane legend held, which the R-454B legends do not all print alike; 0 is printed as 10 in Trane's 2009 and 2010 legends and as 20 in its 2020 one, so no efficiency is published for it; the R-454B generation reads the position as SEER2, with 0 = 20 and 7 = 17). On R-410A models position 2 is the brand letter and position 3 is AC vs heat pump; on the R-454B Low Profile layout positions 2-3 are instead a two letter system type (HP = heat pump, HC = cold climate heat pump). Trane's 2026 handbook (22-8301-39, NOM-1) prints the R-454B Trane outdoor layout as position 2 the brand (T = Trane) and position 3 the system type (C = Cold Climate Heat Pump, T = AC, W = HP), with Nominal Rated SEER2 at 5, the field connection at 6 (0 = Brazed, 5 = Mechanical) and 72 = 6.0 among its tonnage codes; RunTru by Trane (A5AC, A5HP, A5HL) is read off its own RTNOM-1 legend and product rows. | Trane: High · American Standard: Medium | Pub. No. 22-1633-04-1296 (EN)22-1904-1M-EN22-1746-0422-1725-04DLR-PSD004A-EN22-8301-39ODR-PSD038A-EN |
| Carrier | Positions 7-8 are the 2 digit BTU/1000 code in the 24 and 25 families (24ABC636A0030 = 36 = 3 tons). The older 38 family carries a 3 digit code after the series letters (38CKC036 = 036). Carrier's ductless outdoor units are read off their own product data: 38MHRC and 38MARB carry a 2 digit Nominal Capacity at characters 8-9 (38MHRCQ12AA3 = 12 = 1 ton) and 38MAQB at characters 7-8 (38MAQB12R--3 = 12 = 1 ton), each against the legend its own sheet prints (09 = 3/4 ton, up to 24 = 2 tons on 38MHRC and 36 = 3 tons on 38MARB and 38MAQB). | Leading digits: 24 = AC condenser, 25 = heat pump, 58/59 = gas furnace, and on the R-454B generation 26 = air conditioner and 27 = heat pump. Position 6, the digit before the capacity code, is the SEER class in lettered series, printed per family in Carrier's 2016 Nomenclatures (air conditioners 1 = 21, 3 = 13, 4 = 14, 6 = 16, 7 = 17, 9 = 19; heat pumps 0 = 20, 4 = 14, 5 = 15, 6 = 16, 8 = 18, 9 = 19); a digit its family's row does not print publishes no efficiency. The 24 and 25 families carry no refrigerant digit. On the R-454B 26SCA5 and 27SCA5 series, positions 1-2 are the refrigerant and outdoor type (26SCA5-02PD and 27SCA5-02PD print 26 = Puron Advance™ (R-454B) AC and 27 = Puron Advance™ (R-454B) HP) and positions 7-8 the capacity, read off those two sheets; any other 26 or 27 series is identified as Carrier and its tonnage is refused rather than guessed. | High | 38MHRC-01PD38MARB-01PD38MAR-06PDCatalog No 24ABC6-8PD2016cac_nomen27SCA5-02PD26SCA5-02PDForm 38TDA-4PDForm 38-12SM |
| Bryant | Positions 7-9 are the 3 digit capacity code, which Bryant labels 1,000 Btuh nominal (126BNA036000A = 036 = 36,000 BTU/h = 3 tons). Bryant numbers these model positions 1 to 12 and then 14, with no position 13. | Position 1 is the product family (1 = air conditioner), position 2 the tier, position 3 the SEER family digit (3 = 13 SEER on the 113A, 6 = 16 SEER on the 126B), position 4 the major series (B = Puron on the 126B) and position 5 the voltage (N = 208/230-1; the 113A also documents P = 208/230-3 and E = 460/3). The two sheets differ after the capacity: the 126B prints a variation digit at position 6 and leaves 10 to 12 undefined, while the 113A uses 6 for the grille, 10 for a design variation and 11 for the region (N = North). Position 14 is the minor series on both, and neither numbers a position 13. | High | Catalog No. PDS126B-10Catalog No. PDS113A-17 |
| Payne | On the two documented families the Nominal Capacity code sits at positions 7-9 (PA13NA036 = 036 = 3 tons). Both fetched sheets print a code-to-tonnage table, so those values are transcribed rather than calculated, and the two families do not print the same set: PA13 prints 018, 024, 030, 036, 042, 048 and 060, while PA16 omits 018 and adds 037, which its own table reads as 3 tons rather than the 3.08 the code divided by 12 would give. The PA5SAN5 family (R-454B, its June 2025 sheet) is a third documented layout with a different code WIDTH: Catalog No. SSG-PA5SAN5-02 puts a two-digit Nominal Capacity at positions 8-9 (PA5SAN53602W = 36 = 3 tons) and prints both the BTU/h and the tons for each of 18, 24, 30, 36, 42, 48 and 60, so those are transcribed too. Two sizes are sold and never rated: PA16 049 and 061 appear as unit sizes in SS-PA16NA-02 and -03 while no revision of that sheet gives either a Nominal Capacity, so this tool refuses them by name rather than reading them on a ladder the manufacturer does not print. The R-454B PH5SAN5 HEAT PUMP is a fourth documented layout, the PA5SAN5 one with H = HP at position 2 (PH5SAN53600A = 36 = 3 tons), transcribed from Catalog No. SSG-PH5SAN5-02. Payne's remaining families are read by pattern, at whatever position the code falls, and are reported as estimates. | On PA13 and PA16, positions 3-4 are the SEER family digits (PA13 = 13 SEER, PA16 = 16 SEER). That is the family designation, not the unit's rating: SS-PA16NA-08 rates its own tested AHRI combinations between 14.0 and 15.0. Position 5 is the electrical supply and position 6 is the refrigerant (A = R-410A), so on those two families the refrigerant is in the model number. The electrical legend differs between them: SS-PA13NA-08 prints N (208/230-60-1) and P (208/230-60-3, offered only in sizes 036, 048 and 060), while SS-PA16NA-08 prints N alone. When payne.com was fetched 2026-07-25 its air conditioners were the PA4S, PA5S and PA8T families; it now reads "Payne is now WeatherMaker® by Carrier" (fetched 2026-09-26). SSG-PA5SAN5-02 covers PA5SAN5 and is fetched, retained and read, so that family decodes at its own documented positions: position 3 is the SEER2 family digit, position 6 the voltage, position 7 the refrigerant (5 = R-454B), positions 8-9 the Nominal Capacity, position 11 the special feature and position 12 the region. PA4S and PA8T are still covered by no sheet this tool holds and are read by pattern. Payne's R-454B heat pump PH5SAN5 decodes from its own SSG-PH5SAN5-02 at the same positions, with position 2 H = HP and position 12 A = Standard HP. | High | Catalog No. SS-PA13NA-08Catalog No. SS-PA16NA-08Catalog No. SSG-PA5SAN5-02Catalog No. SSG-PA5SAN5-01Catalog No. SS-PA16NA-03Catalog No. SS-PA13NA-07Catalog No. SSG-PH5SAN5-02 |
| Heil, Tempstar, Comfortmaker, Arcoaire, KeepRite, Day & Night, Airquest | Digits 5-6 are the nominal capacity code on the R-410A generations (N4A518GKC100 = 18 = 18,000 BTUH = 1−1/2 tons), which ICP prints as 18, 24, 30, 36, 42, 48 and 60. The current R-454B line inserts an OD Design Type digit at position 5, so its capacity code sits at digits 6-7 instead (N5H5S18AKAAA = 18 = 1-1/2 tons). | Digit 1 is the branding TIER on the R-410A generation, not the brand. That tier key is printed by the R-410A guides only: the current R-454B sheet prints digit 1 as Brand, N =Tempstar, with no tier language at all, so this tool publishes no product line for that generation. On the R-410A layout ICP assigns each letter to several brands at once, including the one that looks unique: H to Heil, Arcoaire, Airquest, Kenmore and ICP Commercial; C to Comfortmaker, Day & Night, Keeprite and Kenmore; T to Tempstar and Kenmore; N to the Entry tier of all of them. So no model number can say which of them built the unit and this tool does not guess. The documents spell it Keeprite, and they also cover Kenmore and ICP Commercial, which this tool does not offer as brands. Digit 3 is the type (A = air conditioner, H = heat pump). Digit 2 is the refrigerant, and each sheet prints exactly one value for it: Form 421 21 6250 01 prints only "4 = R−410A" and Form N5H5S-21-01PD prints only "5 = R-454B". On the two-stage manuals digit 2 is instead the key characteristic (C = Communicating), so no refrigerant is published for that layout. R-22 is not decoded here: the only "2 = R−22" in any of these documents sits in the ACCESSORIES part number guide lower on the same page, where it is digit 5 of an accessory number and not an outdoor unit refrigerant. | High | Form 421 21 6250 01Form 421 04 1701 00Form 428 04 1801 00Form N5H5S-21-01PD |
| Goodman, Amana | Goodman GSX/ASX R-410A models put a 3 digit capacity code at positions 6-8, after the SEER digits (GSX140361 = 036 = 3 tons). That line also ships five codes that are not the code divided by 12: 019 is 1.5 tons, 025 is 2, 031 is 2.5, 037 is 3 and 043 is 3.5. Goodman's R-32 GLXS/GLZS line uses a 2 digit code at positions 8-9 (GLXS4BA3610 = 36 = 3 tons), and Amana's current ASXS S-series uses a 2 digit code at positions 7-8 (ASXS6S3610A = 36 = 3 tons). | On the GSX/ASX layout position 3 is the unit type (X = R-410A condenser, Z = R-410A heat pump, C = the older R-22 era line) and positions 4-5 are the series' nominal SEER, which SS-GSX14 and SS-ASX14 print as 13, 14, 16 and 18 for unit types X and Z on a three-letter prefix; other digits, other unit types and a fourth prefix letter publish no efficiency (GSC13 reads its own SS-GSC13, which prints 13 SEER). On the R-32 GLXS/GLZS layout position 2 is L for the R-32 split system line, position 3 is the outdoor type (X = condenser, Z = heat pump) and the tier digit is a printed SEER2 range (4 = 13.8 to 14.5 SEER2, 5 = 14.6 to 15.9 SEER2), so a range is what this tool publishes. Amana's ASXS layout gives position 3 as the unit type and position 4 as the side-discharge cabinet; this tool publishes no refrigerant for that line, because Amana's own spec sheet labels it R-410A while Amana markets it as R-32. | High | SS-GSX14RS6200007r27SS-GLXS4B-R32SS-GLZS4B-R32SS-GSC13SS-ALZS5B-R32SS-ASX14SS-ASXS6SS-ALXS5B-R32 |
| Daikin | Two layouts, and Daikin prints a per-code tonnage table for each: one for the current layout, and on the older layout one per series sheet (the series this tool holds a sheet for are read off their own sheet; other older series are not). On the current twelve-position split-system layout the capacity is two digits at positions 7 and 8, between the sales region letter and the electrical digit (DX4SEA3610AA = 3 tons), and Daikin prints seven codes with their tonnage in words. On the older layout the two digits after DX or DZ are the nominal SEER series and the capacity is a three-digit code at positions 7 to 9. Daikin's own spec sheets for the DX13SA, DX14SA, DX18TC, DX20VC, DZ14SA, DZ16SA, DZ18TC and DZ20VC series each print that layout with their own capacity column (DX14SA's includes 019, 025, 031, 037 and 043, each printed as the size of its even neighbour), so each of those series is read off its own sheet; an older series none of them names (DX16SA036 = 3 tons) is read by the universal BTU/1000 convention. Mini splits: BTU/1000 class printed directly (FTX12NMVJU = 12,000 BTU/h, about 1 ton). Daikin's own ductless line is not sourced here; the separate mini-split scheme holds manufacturer sheets for five other brands, and Daikin is not one of them. | The field names on the current layout are Daikin's own, read off its printed Nomenclature: position 1 is the Brand cell (D - Daikin), position 2 the Type (X - AC R-410A, Z - HP R-410A), position 3 an efficiency BAND rather than a rating (SS-DX4SE heads it SEER2 and SS-DZ4SE heads it SEER), position 4 the Compressor (S single stage, T two stage, V variable speed), position 5 the Feature, position 6 the Sales Region, positions 7-8 the Nominal Tonnage, position 9 the Electrical and positions 11-12 the major and minor revisions. The SEER2 digit is deliberately not published as a number because Daikin prints it as a range (13.8 to 14.5 = 4) and the top band is open-ended. On the older layout the two digits after DX or DZ are the series' nominal SEER, published only where that series' own Daikin sheet is held (DX13SA, DX14SA, DX18TC and DX20VC, and the DZ sheets for theirs); an older series none of them names, such as DX16SA, publishes no efficiency. The letter after the digits is the stage. | Medium | SS-DX4SESS-DZ4SESS-DX14SASS-DX13SASS-DZ16SASS-DZ14SASS-DX18TCSS-DZ18TCSS-DX20VCSS-DZ20VC |
| Lennox | Capacity is the dash group in BTU/1000 (XC21-036-230 = 3 tons; EL16XC1-048 = 4 tons; SL25KCV-036-230A-1 = 3 tons). The current R-454B line also ships odd codes that are not the code divided by 12: 041 is 3.5 tons, 047 is 4 and 059 is 5. The group after the capacity is the voltage (230, 233, 463), not a second capacity. The short form without the voltage group, which Lennox's own Unit Information 100195 (EL16KP1) and 100108 (ML14KP1) print (EL16KP1-036), reads the same dash group. A family whose own book prints its sizes reads only those: EL16KP1 and ML14KP1 (018, 024, 030, 036, 042, 048 and 060, in 100195 and 100108) and EL18KSLV (024, 036 and 060, in 508700-01); any other code on them is refused rather than read off the shared ladder. | On the legacy XC/EL/ML models the series name carries a number (XC21, EL16XC1, ML14XC1), which this tool does not publish as a SEER because no Lennox document it cites prints one, and the refrigerant is not encoded in a stable position. The current R-454B scheme is different and is documented: SL/EL/ML is the product tier, the next two digits sit in the position Lennox labels Nominal Efficiency, K is the refrigerant (R-454B), then the unit type (C = air conditioner, P = heat pump, L = cold climate heat pump) and the compressor stage (1, 2 or V). | High | Form 210965Model Numbering Systems, section 3.1 |
| Armstrong Air, AirEase, Ducane, Concord | Two generations, and only one of them has a per-code tonnage table. On the current R-454B line the capacity is the sixth field, between the compressor letter and the voltage letter P (A7AC14F36P = 3 tons; 7AC14F60P = 5 tons), and Allied prints ten codes with their tonnage in words. Three of the ten are not the code divided by 12: 41 is 3.5 tons, 47 is 4 and 59 is 5. On the older R-410A 4SCU line the capacity sits in the same relative place, after the region digit and before the voltage letter P (4SCU16LS136P = 3 tons), and Allied's own literature states it as thousands of BTU rather than as tons, over seven codes from 18 to 60. The group after the voltage letter is the major and minor revision code, not a second capacity. The current R-454B HEAT PUMPS are read off their own forms, one per family (A7HP14F, 7HP14F, A7HP19V, 7HP19V, A7CP21V, A7SCP18V, 7SCP18V and 7SHP15V), with the capacity in the same place before the voltage letter P and each against the legend its own form prints: the 19V forms print only 36 = 3 tons and 60 = 5 tons, and the two SCP18V forms print 60 as "4/5- ton", two tonnages for one code, which this tool refuses rather than picking one. | The field names here are Allied's own. The leading digit is the refrigerant (4 = R-410A, 7 = R-454B). On the R-454B line the leading A is the Brand cell and it names a PAIR, AirEase or Armstrong Air, while the Ducane and Concord form carries no brand cell at all; AC is the product type, the two digits after it are the SEER2 class, and the letter after those is the compressor (F = fixed speed, V = variable speed). On the R-410A 4SCU line the digits after SCU are the SEER class (13 LE, 14 LE and 16 LS are each printed on their own series' guide, and any other pairing publishes no efficiency) and the two letters after them are one field Allied calls the TIER (LS = louvered two-stage communicating enabled, LE = louvered enhanced), not a letter pair to be split. The digit before the capacity is the region restriction. On the R-454B heat pumps the product type cell reads HP = Heat Pump or CP = Cold Climate Heat Pump, the side-discharge forms add a Styling cell (S = Side Discharge) before it, and the 14F forms print a Control cell after the voltage letter (- = 24V; the A7HP14F form adds C = Comfort Sync A3 or 24V). | High | Form Number A7AC14F-200Form Number 7AC14F-200Form Number A7HP19V-200Form Number 7HP19V-200Form Number A7HP14F-200Form Number 7HP14F-200Form Number A7CP21V-200Form Number A7SCP18V-100Form Number 7SCP18V-100Form Number 7SHP15VFORM NO. 4SHP16LS-100 (01/2021)FORM NO. 4SHP13LE-100 (12/2016)FORM NO. 4AC14-100 (06/2015) |
| Rheem, Ruud, WeatherKing, Sure Comfort | Two layouts are documented and the capacity sits in a different place in each. The current families run brand, product category, SEER2, region, refrigerant, then the Capacity cell at characters 7-8 (RA14AZ36AJ1NA = 36 = 3 tons; RD18AY60AJVCA = 60 = 5 tons). The older nine-field layout has no region or refrigerant cell, so the same code sits at characters 5-6 instead (RA1636AJ1NA = 36 = 3 tons). The two cannot be confused: the older layout puts a DIGIT where the current one requires the region letter. The two generations document different capacity sets, and this tool does not pool them. The four current-layout documents this tool holds for this layout's RA15AZ and RD16AY lines (forms 92-104921-25-04 and 92-110354-01-01, and the spec sheets P22-844 rev 1 and A22-336 rev 5) print exactly four codes, 24, 36, 48 and 60, and each spec sheet corroborates its own legend on the same printed page with an Available Models list; Rheem's RA14AY sheet (A11-346 rev 3) prints seven, 18 through 60, and is read for the RA14AY series only. The nine-field legacy legends print all seven. So a current-layout model of another series whose size code is 18, 30 or 42 is refused with the reason printed, because reading it off the code = BTU/1000 pattern would be extrapolating from the manufacturer's own list rather than reading it. The 14AJM Value Series is read off its own sheet (A11-215 rev 2), whose codes 19, 25, 49 and 56 print 18,000, 24,000, 47,000 and 54,000 BTU/h; 49 is not a whole or half ton and is refused. | Brand cell: R = Rheem / Ruud, U = Ruud Ultra, S = Sure Comfort / Russel By Rheem, W = WeatherKing, ML = Mainline. Only part of that key is printed by the documents registered for this scheme: the Rheem-published sheets print R as Ruud alone, print Sure Comfort and WeatherKing as bare brand names rather than as lettered rows, and print no U, no ML and no Russel By Rheem anywhere. Those halves are carried by forms 92-104921-25-04 and 92-110354-01-01. ML is two characters and is refused rather than decoded, because this tool carries no Mainline badge and would have to print a Rheem or Ruud label over it. Product category: A = air conditioner, P = heat pump, D = side discharge heat pump. Refrigerant: Z = R-410A, Y = R-454B, W = a future refrigerant. Voltage J = 1 phase 208-230 V 60 Hz is the only voltage the four current-layout documents held for the RA15AZ and RD16AY lines print; Rheem's RA14AY sheet (A11-346 rev 3) and the nine-field legacy sheets also print C for three-phase 208/230 V and D for three-phase 460 V. Type 1/2/3/V = single, two, three stage and fully variable. Controls C/N/U = communicating, non-communicating, other communicating. The region cell prints one value, A for All Regions; a model carrying anything else still reports its size, because that cell is one character wide whatever it holds and the refrigerant letter before the size and the voltage, stage and control letters after it all match the printed key, but this tool publishes no meaning for the letter itself and says so on the result. | High | FORM NO. P22-844 REV. 1FORM NO. A22-336 REV. 5Form No. M22-1090FORM NO. ASC-220 REV. 6FORM NO. A66-221 REV. 5P11-806 REV. 12FORM NO. A11-346 REV. 3FORM NO. A11-215 REV. 2 |
| York, Luxaire, Coleman (HVAC), Fraser-Johnston, Guardian | Three layouts are documented, and each prints its own tonnage legend rather than leaving it to arithmetic. On the current R-454B generation the model runs brand, product type, efficiency, then the Nominal unit capacity (MBH) code at characters 4-5 (YC436E2S11 = 3 tons). On the R-410A YC2/YH2 generation the efficiency-and-staging field is two characters wide (2D, 2E, 2F), so the same capacity code sits at characters 5-6 instead (YC2E36SB21S = 3 tons). The two cannot be confused: that field always begins with 2 and the R-454B efficiency character never does. The LX Series name does not identify this layout: the manufacturer brands the XC3, YC3 and YC6 guides as LX Series too, and every one of those carries the R-454B table with the capacity at characters 4-5. The R-454B and R-410A legends read 18 = 1.5 ton, 24 = 2, 30 = 2.5, 36 = 3, 42 = 3.5, 48 = 4 and 60 = 5, identically, across a refrigerant change. One code sits OFF that legend: the 2 ton class ships as two units, and YC425E2S11 is published as 2 tons by its own guide's performance section even though 25 appears in no nomenclature table. The Coleman TC4B air conditioners carry their own layout, from Form 5581701-CTG-D-0420 (also branded LX Series): T, C, 4, B, then the capacity at characters 5-6 with the same seven codes (TC4B2422SA = 2 tons). | Digit 1 is the brand and the manufacturer prints only three values for it: Y for YORK, X for a private brand and R for OTC. It never names which private brand, so this tool refuses to read Luxaire, Coleman, Fraser-Johnston or Guardian out of a model number. Digit 2 is the product type (C = AC, H = HP). The refrigerant is published only from the model's own generation: the R-454B table prints E = R-454B, the LX table prints B = R-410A, and neither key is carried across the generation boundary. The modulating YH9 line is documented as DUAL TONNAGE and is reported as an estimate rather than a single confident decode. | High | Form 6788932-YTG-A-0526Form 6788936-UTG-A-0526Form 6552867-YTG-D-0226Form 6644185-UTG-C-0625Form 6260578-YTG-C-0823Form 5581701-CTG-D-0420Form 6552871-UTG-D-0226Form 6601763-YTG-B-0725Form 6515461-YTD-A-1225 |
| Intertherm, Miller, Gibson, Frigidaire, Maytag, Westinghouse, Tappan, Kelvinator | Read per legend. The SA1BF and SA2BF split units are read off the size lists their installation instructions print (10502330: 24K to 48K on M1SN, 60K on M2SN); the R10 packaged gas/electric unit's code 48 off the one cell NGH's 837F-0822 prints ("48 = 48,000 Btuh"); other 837F split units by its "Size (MBTU)" rule, as a labelled estimate on the 18 to 60 ladder; older lines without a held legend as a 3 digit BTU/1000 code in the model suffix, 018 to 060 (ET4BE-036K = 3 tons), also an estimate. | Where 837F-0822 or the SA1BF/SA2BF instructions print them: the refrigerant ("4 = R-410A"), the unit type (split air conditioner or heat pump, packaged gas/electric, packaged air conditioner or heat pump) and the SEER2 band; on the older lines, capacity only. | Medium | 837G-0925840G-0925837F-082210502330 |
| Mitsubishi Electric, Fujitsu, Gree, MrCool, Bosch, Samsung, Midea, Senville, Pioneer, Daizuki, Friedrich | The digits in the model are the BTU/h CLASS divided by 1,000: 09, 12, 15, 18, 24, 30, 36 (MSZ-GS12NA-U1 = 12,000 BTU/h = 1 ton; DIY-36-HP = 3 tons). Those are the classes the sheets held here print; this tool also reads the larger classes 42, 48, 60 on the shared ladder, so AOU48RLXFZ returns 4 tons and 3VIR60HP230V1A returns 5 tons. Both come back as estimates, like every mini split this rule reads. Fujitsu prints some sizes with a SINGLE DIGIT and this tool does not read that rendering: its own submittals print AUU7RLF at 7,000 Btu/h nominal cooling and AUU9RLF at 9,000, and both return no match here, because this tool only reads capacity runs of two or three digits. The 9 class itself is read, as 09. Pad the same code to AUU09RLF and it returns a reading at estimate status, which is how that cause was measured rather than assumed. The class is a name, not a rating, and these makers' own specification tables show the difference. Most models read here are rated exactly the class figure. These are not: Gree's 3VIR24HP230V1A is named 24,000 and its own table rates 22,000 Btu/h cooling, Gree's 3VIR09HP230V1A rates 9,100, Mitsubishi's MSZ-GS15NA-U1 rates 14,000, and MrCool's DIY-24-HP rates 23,000. This tool publishes the class, which is what nominal capacity means; size a charge or a load against the rated figure on the unit's own sheet, not against the digits. | Capacity only. The digits are the manufacturer's capacity CLASS; on Gree, Mitsubishi and MrCool sheets read here, the rated cooling capacity can sit either side of the class (24 rating 22,000, 15 rating 14,000, 09 rating 9,100). | Friedrich, Fujitsu, Gree, Mitsubishi Electric, MrCool: Medium · Bosch, Daizuki, Midea, Pioneer, Samsung, Senville: Convention (no maker chart) | AUU7RLFAUU12RLFAUU18RLF3VIR09HP230V1A3VIR18HP230V1A3VIR24HP230V1ASB_MSZ-GS09NA-U1_MUZ-GS09NAH-U1_202405SB_MSZ-GS12NA-U1_MUZ-GS12NAH-U1_202405SB_MSZ-GS15NA-U1_MUZ-GS15NAH-U1_202405mc-diy-4-br-en-01mc-diy-es-4-ss-en-01Floating Air A2L Select and Pro Submittal (06-26-2024) |
| LG | LG heads this field "Capacity (Cooling capacity in Btu/h)" and enumerates it 9 = 9,000, 12 = 12,000, 18 = 18,000, 24 = 24,000, 36 = 36,000, 42 = 42,000 and 48 = 48,000, so the key is thousands of BTU/h and not hundreds. The key sits immediately after the frame-type letter and the optional indoor or outdoor letter (LSN120HSV5 = 12,000 BTU/h = 1 ton; LS181HSV5 = 18,000 = 1.5 tons). The capacity cell in an LG model carries three characters while the legend enumerates one or two, and LG documents the third nowhere, so it is read as no part of the capacity and nothing is published for it. | The field names here are LG's own. Position 1 is L for LG, position 2 the Frame Type (A Art Cool, S Standard, C four-way ceiling-cassette, D ceiling-concealed duct low static, H ceiling-concealed duct high static, V vertical-horizontal air handling), then N for an indoor unit, U for an outdoor unit or neither for a matched system, then the capacity, then the System Type (LG prints exactly one value, H for heat pump), then the Style (SV high efficiency inverter, VP Gallery, YV Premier, EV Mega, V standard inverter, T thermostat compatible, LV extended piping) and finally the generation. The generation values are enumerated by only one of the two manuals held and the decode says so. | Medium | EM_SZ_HighEfficiency_WallMounted_11_22EM_SZ_ArtCoolMirror_WallMounted_09_23 |
| Bard | Digits 2-3 are the Nominal Capacity code, and each of the five fetched Bard sheets prints its tonnage in words rather than leaving it to arithmetic: 12 is 1 ton, 18 is 1.5, 24 is 2, 30 is 2.5, 36 is 3, 42 is 3.5, 48 is 4, 60 is 5 and 72 is 6. The ranges differ by product: the ducted wall-mount air conditioners run 18 to 72 with the one-ton W12 on its own sheet, and the heat pump line stops at 60. Bard's MEGA-TEC line instead carries a three digit code at digits 2-3-4 (090 to 180, 7.5 to 15 tons); it is light commercial and this tool refuses it rather than reading two of its three digits. | Digit 4 is the unit type and control location: A is an air conditioner with right or centre controls, L is an air conditioner with left side controls (offered on W18 to W36 only) and H is a heat pump (W18 to W60). Digit 5 is the revision, and on the current generation it carries the refrigerant: F is Bard's R-454B revision, printed as such in both current sheets. The R-410A sheets label digit 5 only as a revision level and never tie it to a refrigerant, so this tool publishes a refrigerant for the F models and none for the others rather than inferring one from the document title. | High | Form No. S3678-0626Form No. S3659-0326Form No. S3595-1124Form No. S3586-1123Form No. S3565-0525 |
5 brands are sourced to their own manufacturer nomenclature documents and have a dedicated page naming those documents: Carrier tonnage by model number, Trane tonnage by model number, Lennox tonnage by model number, Goodman tonnage by model number, Amana tonnage by model number. The remaining schemes above are served by this decoder with the confidence label their sources earn.
The manufacturer documents we hold
103 documents behind 15 of the 15 schemes Where a card says nothing about revision currency, we have not checked it. Each is listed with the reference that makes it re-findable, the edition where the document prints one, the manufacturer host it came from and the date we fetched it, so you can look the same document up and check what we read. Every document listed here was reachable without an account on the date we checked it. Manufacturers retire and re-file literature, so an address that worked for us may not work for you.
Trane, American Standard
Pub. No. 22-1633-04-1296 (EN)
Split System Heat Pump Product Data
1296. Published by elibrary.tranetechnologies.com. Fetched 2026-10-01. md5 1926797c851d3d052c36e2913e520a2d, 527,783 bytes
22-1904-1M-EN
Product Data 4TTR4-L Split System Air Conditioner
April 2020. Published by trane.com. Fetched 2026-07-24. md5 38c369182dc519da133c0a02e5703551, 1,043,539 bytes
Whether this is the current revision is unconfirmed. Checked 2026-08-27.
22-1746-04
Split System Cooling Product & Performance Data XL19i
04/09. Published by elibrary.tranetechnologies.com. Fetched 2026-10-01. md5 c87dd557f9bb131b6024b63420bc96bf, 502,996 bytes
22-1725-04
Split System Heat Pump Product Data
02/10. Published by elibrary.tranetechnologies.com. Fetched 2026-10-01. md5 4606f441ad9aa01ab8a1015d3d00b7b6, 1,133,658 bytes
DLR-PSD004A-EN
Product and Submittal Data, Outdoor Unit 5HCL9
February 2026. Published by elibrary.tranetechnologies.com. Fetched 2026-07-24. md5 4c63c3d5f0a432809f885dd2672d49df, 190,354 bytes
Current revision as cited. Checked 2026-08-27.
22-8301-39
2026 Residential and Light Commercial Product Handbook
Effective 1/1/26. Published by elibrary.tranetechnologies.com. Fetched 2026-10-01. md5 64887d62465276dc6f4d1eb9e2bdade4, 30,298,138 bytes
ODR-PSD038A-EN
Inverter Side Discharge Heat Pump 5HCL5
December 2025. Published by elibrary.tranetechnologies.com. Fetched 2026-07-24. md5 19236ddfa21fd34bcbb77d04af0730c1, 935,356 bytes
Current revision as cited. Checked 2026-08-27.
Carrier
38MHRC-01PD, 38MARB-01PD and 38MAR-06PD print a per-code tonnage table, so a tonnage read off them is transcribed from the manufacturer's own table rather than calculated. The other documents listed below are not the basis of a transcribed tonnage on this page.
38MHRC-01PD
38MHRC, Outdoor Unit Single Zone Ductless System, Sizes 09 to 24, Product Data
Edition Date: 04/21. Published by www.shareddocs.com. Fetched 2026-09-25. md5 4c184617b963f787534aaa7fdff268ff, 3,111,996 bytes
38MARB-01PD
38MARB, Outdoor Unit Single Zone Ductless System, Sizes 09 to 36, Product Data
Edition Date: 01/21. Published by www.shareddocs.com. Fetched 2026-09-25. md5 ab6f1fb78dd17db12e148eda991f664c, 3,806,004 bytes
38MAR-06PD
38MA*R, Outdoor Unit Single Zone Ductless System, Sizes 09 to 36, Product Data
Edition Date: 07/19. Published by www.shareddocs.com. Fetched 2026-09-25. md5 2f5f1a584ddda5948e4885a0ff5cce50, 3,352,247 bytes
Catalog No 24ABC6-8PD
Product Data 24ABC6 Comfort 16 Air Conditioner with Puron Refrigerant, 1-1/2 to 5 Nominal Tons
Edition Date 05/19. Published by carrier.com.pr. Fetched 2026-07-24. md5 0e0ede96f5f59d22819b9d8b706e7114, 1,024,414 bytes
Current revision as cited. Checked 2026-08-27.
2016cac_nomen
2016 Nomenclatures: Air Conditioners, Heat Pumps, Fan Coils, Evaporator Coils, 90% Gas Furnaces and 80% Gas Furnaces
2016. Published by www.shareddocs.com. Fetched 2026-07-24. md5 33ff8cef2ded8156dad38d3f455e0a12, 392,736 bytes
Current revision as cited. Checked 2026-08-27.
27SCA5-02PD
27SCA5 Comfort™ Series Single-Stage Heat Pump with Puron Advance™ Refrigerant Product Data
Edition Date: 05/25. Published by www.shareddocs.com. Fetched 2026-10-01. md5 9aac90fcc6fa6df2545a2c5938bf23e5, 1,355,367 bytes
26SCA5-02PD
26SCA5 Comfort™ Series Single-Stage Air Conditioner with Puron Advance™ Refrigerant Product Data
Edition Date: 06/25. Published by www.shareddocs.com. Fetched 2026-10-01. md5 58a38de31ce1bfd85b951f931cae77bc, 1,658,288 bytes
Form 38TDA-4PD
SYNERGY 2000 38 TDA (60 Hz) Two-Speed Electric Air Conditioner Sizes 036, 048, and 060
2-99. Published by www.shareddocs.com. Fetched 2026-10-01. md5 c0f7c2ac23a0224d81fb91b10cff4192, 201,264 bytes
Form 38-12SM
Air Conditioners and Heat Pumps Using Puron® Refrigerant Application Guideline and Service Manual
4-05. Published by www.shareddocs.com. Fetched 2026-09-17. md5 f1f2ef471c899c98c87f424aa002edd9, 419,626 bytes
Bryant
These documents print the code's unit but no per-code tonnage table, so each tonnage is arithmetic on a manufacturer-stated unit rather than a transcribed value.
Catalog No. PDS126B-10
MODEL 126B PREFERRED SERIES AIR CONDITIONER WITH PURON REFRIGERANT, 1-1/2 TO 5 NOMINAL TONS, Product Data
Edition Date: 10/19. Published by www.shareddocs.com. Fetched 2026-07-24. md5 37e268711f78f395c3085c7b72c14be2, 847,789 bytes
Current revision as cited. Checked 2026-08-27.
Catalog No. PDS113A-17
113A Legacy Line 13 Air Conditioner with Puron Refrigerant, 1-1/2 to 5 Nominal Tons (Sizes 018-060), Product Data
Edition Date: 12/16. Published by www.shareddocs.com. Fetched 2026-07-24. md5 521d60215e8c55a5eeeef16d0676a834, 1,451,592 bytes
A newer revision of this document exists. Checked 2026-08-27.
Payne
These documents print a per-code tonnage table, so each tonnage is transcribed from the manufacturer's own table rather than calculated.
Catalog No. SS-PA13NA-08
PA13NA / PA13PA, 13 SEER Split-System Air Conditioner With R-410A Refrigerant, Single & Three Phase, 1-1/2 To 5 Tons, Product Data
Edition Date: 12/16. Published by www.shareddocs.com. Fetched 2026-07-25. md5 b7e20f8744a43b2fad626f15bfc1bbb5, 1,674,678 bytes
A newer revision of this document exists. Checked 2026-08-27.
Catalog No. SS-PA16NA-08
PA16NA, 16 SEER Split System Air Conditioner With R-410A Refrigerant, 2 To 5 Nominal Tons, Product Data
Edition Date: 11/18. Published by www.shareddocs.com. Fetched 2026-07-25. md5 1a97928c398157a4f497f8ec1c0f35f9, 687,053 bytes
A newer revision of this document exists. Checked 2026-08-27.
Catalog No. SSG-PA5SAN5-02
PA5SAN5, Single-Stage Air Conditioner with R-454B Refrigerant, 1.5 to 5 Tons, Product Data
Edition Date: 06/25. Published by www.shareddocs.com. Fetched 2026-08-27. md5 8c876c7f65997577b7ed5d3cbc366d4e, 1,045,584 bytes
Current revision as cited. Checked 2026-08-27.
Catalog No. SSG-PA5SAN5-01
PA5SAN5, Single-Stage Air Conditioner with R-454B Refrigerant, 1.5 to 5 Tons, Product Data (the revision SSG-PA5SAN5-02 replaces)
Edition Date: 07/24. Published by www.shareddocs.com. Fetched 2026-08-27. md5 ebd923dc6ad87cf725f20541f9161f5a, 1,056,412 bytes
Catalog No. SS-PA16NA-03
PA16NA, 16 SEER Split System Air Conditioner with R-410A Refrigerant, 1.5 To 5 Nominal Tons, Product Data
Edition Date: 05/12. Published by www.shareddocs.com. Fetched 2026-08-27. md5 de34725cc2893bfe66b0d01c29a5b613, 1,680,356 bytes
A newer revision of this document exists. Checked 2026-08-27.
Catalog No. SS-PA13NA-07
PA13NA / PA13PA, 13 SEER Split-System Air Conditioner With R-410A Refrigerant, Single & Three Phase, 1-1/2 To 5 Tons, Product Data (the revision SS-PA13NA-08 replaces)
Edition Date: 08/16. Published by www.shareddocs.com. Fetched 2026-07-25. md5 abcbe750b5e4f3d8b2e1b6f8e2bca540, 1,803,380 bytes
Catalog No. SSG-PH5SAN5-02
PH5SAN5, Single-Stage Heat Pump with R-454B Refrigerant, 1-1/2 To 5 Tons, Product Data
Edition Date: 06/24. Published by www.shareddocs.com. Fetched 2026-09-25. md5 e89f49afc58cae540e821e632bfc1ac8, 1,138,443 bytes
Heil, Tempstar, Comfortmaker, Arcoaire, KeepRite, Day & Night, Airquest
These documents print a per-code tonnage table, so each tonnage is transcribed from the manufacturer's own table rather than calculated.
Form 421 21 6250 01
PRODUCT SPECIFICATIONS, Split System Air Conditioner: N4A5, EFFICIENT 14 SEER/11.7−12.2 EER AIR CONDITIONER, 1-1/2 THRU 5 TONS SPLIT SYSTEM
5/15/2015. Published by www.shareddocs.com. Fetched 2026-07-26. md5 a5c4fddb94634ff3126182e99882bc9f, 745,708 bytes
Form 421 04 1701 00
TECHNICAL SUPPORT MANUAL, Two Stage Split System Air Conditioner (C,H,T)CA7
March 2012. Published by www.shareddocs.com. Fetched 2026-07-26. md5 ae96876be4478f55fbff18ca1ee1f430, 1,264,841 bytes
Form 428 04 1801 00
TECHNICAL SUPPORT MANUAL, Split System Heat Pump (C,H,T)CH9 Two-Stage
April 2012. Published by www.shareddocs.com. Fetched 2026-07-26. md5 7d57c98f4ee9e06e4aa0ade2e9eec05c, 1,807,742 bytes
Form N5H5S-21-01PD
N5H5S: Product Data, R-454B Split System Heat Pump
21-01PD revision, R-454B generation. Published by www.shareddocs.com. Fetched 2026-07-26. md5 16cd259edd1f2c1748754b6d6f872a29, 1,415,623 bytes
Goodman, Amana
SS-GSX14
Product Specifications SS-GSX14
1/19. Published by apps.goodmanmfg.com. Fetched 2026-07-24. md5 0c6fab34a463008e815f1871aa2ff3f9, 3,514,942 bytes
The manufacturer serves a newer revision at another of its own addresses. Checked 2026-08-27.
RS6200007r27
Service and Troubleshooting ASXC, DSXC, and GSXC Condensing units, ASZC, DSZC, and GSZC Split System Heat Pumps
May 2023. Published by partnerlinkmarketing.goodmanmfg.com. Fetched 2026-10-03. md5 83028f299471f1c30fab11cc3c7dbeec, 5,019,098 bytes
SS-GLXS4B-R32
Product Specifications SS-GLXS4B-R32
03/26. Published by goodmanmfg.com. Fetched 2026-07-24. md5 f616e7eb101dbdc0d683e636a054b127, 2,860,957 bytes
Current revision as cited. Checked 2026-08-27.
SS-GLZS4B-R32
Product Specifications SS-GLZS4B-R32
07/26. Published by goodmanmfg.com. Fetched 2026-08-27. md5 1a8da8079dc8ea058e65170a981259f1, 2,507,338 bytes
Current revision as cited. Checked 2026-08-27.
SS-GSC13
GSC13 Energy-Efficient Split System Air Conditioner 13 SEER / R-22 (Product Specifications)
5/15. Published by apps.goodmanmfg.com. Fetched 2026-10-01. md5 5f263c4dc7c7b5f1417f923456ed7e14, 608,816 bytes
SS-ALZS5B-R32
Product Specifications SS-ALZS5B-R32
10/25. Published by amana-hac.com. Fetched 2026-08-27. md5 534c9ec1fc9dfe580db439e1a9e4ff30, 2,335,456 bytes
Current revision as cited. Checked 2026-08-27.
SS-ASX14
Product Specifications SS-ASX14
2/20. Published by amana-hac.com. Fetched 2026-07-24. md5 40982c4ccfdcc6eee7b79cc016cac671, 4,042,827 bytes
Current revision as cited. Checked 2026-08-27.
SS-ASXS6
Product Specifications SS-ASXS6
09/24. Published by amana-hac.com. Fetched 2026-07-24. md5 da45dfc1eb221b9d0ef1ef2a7a57fbb3, 2,604,278 bytes
Current revision as cited. Checked 2026-08-27.
SS-ALXS5B-R32
Product Specifications SS-ALXS5B-R32
01/26. Published by amana-hac.com. Fetched 2026-07-24. md5 559dfa3067a4aba7be0e8b1f54cd3b7d, 2,176,204 bytes
Current revision as cited. Checked 2026-08-27.
Daikin
These documents print a per-code tonnage table, so each tonnage is transcribed from the manufacturer's own table rather than calculated.
SS-DX4SE
DX4SE Energy-Efficient Split System Air Conditioner (Product Specifications)
06/23 (printed on the cover directly under the form number SS-DX4SE; the line beneath it names the revision this one supersedes). Published by daikincomfort.com. Fetched 2026-08-28. md5 46d4f61c0b3c6f0cb149092644cfa206, 3,792,377 bytes
SS-DZ4SE
DZ4SE Split-System Heat Pump (Product Specifications)
04/24 (printed on the contents page directly under the host name; the line beneath it names the revision this one supersedes). Published by daikincomfort.com. Fetched 2026-08-28. md5 752b1f0ad9efa1cbe9224bd7813cf0dc, 2,912,253 bytes
SS-DX14SA
DX14SA Energy-Efficient Split System Air Conditioner (Product Specifications)
09/20 (Supersedes 12/19). Published by cdn.daikincloud.io. Fetched 2026-10-01. md5 826702cebe4859f1d2a0c83c37fd2920, 1,236,659 bytes
SS-DX13SA
DX13SA Energy-Efficient Split System Air Conditioner (Product Specifications)
09/20 (Supersedes 07/20). Published by cdn.daikincloud.io. Fetched 2026-10-01. md5 cca06f0a1eab446bd260e64ba8d8beff, 1,115,302 bytes
SS-DZ16SA
DZ16SA Split-System Heat Pump (Product Specifications)
11/19 (Supersedes 8/19). Published by cdn.daikincloud.io. Fetched 2026-10-01. md5 cbcc1a04e275f7887dc5e1df1f2c4575, 1,682,451 bytes
SS-DZ14SA
DZ14SA Energy-Efficient Split System Heat Pump
06/20. Published by daikincomfort.com. Fetched 2026-09-29. md5 94cc3e1634100c490f633f1557cdafc3, 1,261,953 bytes
SS-DX18TC
DX18TC Split System Air Conditioner (Product Specifications)
03/21 (Supersedes 03/20). Published by cdn.daikincloud.io. Fetched 2026-10-01. md5 3d75b2fb43183b8daabb1812cf1ef87f, 1,226,638 bytes
SS-DZ18TC
DZ18TC Split System Heat Pump (Product Specifications)
03/21 (Supersedes 03/20). Published by cdn.daikincloud.io. Fetched 2026-10-01. md5 743648e62d55ffc00950dc01970da850, 1,307,572 bytes
SS-DX20VC
DX20VC High-Efficiency Split System Air Conditioner (Product Specifications)
03/21 (Supersedes 01/21). Published by cdn.daikincloud.io. Fetched 2026-10-01. md5 ed0b97c85259c72cba0072fd742b7dc8, 1,412,335 bytes
SS-DZ20VC
DZ20VC Split System Heat Pump (Product Specifications)
03/21 (Supersedes 01/21). Published by cdn.daikincloud.io. Fetched 2026-10-01. md5 23343730b72709f7d27f249b5e2acdab, 1,322,246 bytes
Lennox
Form 210965
MODEL NUMBER IDENTIFICATION (Current Product)
March 2025. Published by lennox.com. Fetched 2026-08-27. md5 1a8c79379bcd50d1d87e392b53f254ae, 339,991 bytes
Current revision as cited. Checked 2026-08-27.
Model Numbering Systems, section 3.1
Model Numbering Systems
Published by lennox.com. Fetched 2026-08-27. md5 fb09e544931b0c81b7b93b50e245417c, 873,551 bytes
Current revision as cited. Checked 2026-08-27.
Armstrong Air, AirEase, Ducane, Concord
Form Number A7AC14F-200, Form Number 7AC14F-200, Form Number A7HP19V-200, Form Number 7HP19V-200, Form Number A7HP14F-200, Form Number 7HP14F-200, Form Number A7CP21V-200, Form Number A7SCP18V-100, Form Number 7SCP18V-100 and Form Number 7SHP15V print a per-code tonnage table, so a tonnage read off them is transcribed from the manufacturer's own table rather than calculated. The other documents listed below are not the basis of a transcribed tonnage on this page.
Form Number A7AC14F-200
MODEL NUMBER IDENTIFICATION, A7AC14F, Single-Stage | Omniguard Coil | R-454B | 60Hz, RESIDENTIAL PRODUCT SPECIFICATIONS
October 2025 (printed on the document as "Form Number A7AC14F-200 | October 2025" over "Supersedes all previous versions"). Published by armstrongair.com. Fetched 2026-08-27. md5 1355d7f10e9d1a651c8e159c5270ac15, 1,621,047 bytes
Open it on the publisher's asset host (s7d9.scene7.com, the asset host armstrongair.com publishes through)
Form Number 7AC14F-200
MODEL NUMBER IDENTIFICATION, 7AC14F, Single-Stage | Omniguard Coil | R-454B | 60Hz, RESIDENTIAL PRODUCT SPECIFICATIONS
January 2026 (printed on the document as "Form Number 7AC14F-200 | January 2026" over "Supersedes all previous versions"). Published by ducanehvac.com. Fetched 2026-08-27. md5 f1b5cae3911809a7f2288d6a3a0e6031, 1,995,572 bytes
Open it on the publisher's asset host (s7d9.scene7.com, the asset host ducanehvac.com publishes through)
Form Number A7HP19V-200
MODEL NUMBER IDENTIFICATION, A7HP19V, R-454B heat pump, RESIDENTIAL PRODUCT SPECIFICATIONS
October 2025 (printed on the document as "Form Number A7HP19V-200 | October 2025"). Published by armstrongair.com. Fetched 2026-09-25. md5 13a24417365ecfe29bbcda6fc8aff722, 1,887,013 bytes
Open it on the publisher's asset host (s7d9.scene7.com, the asset host armstrongair.com publishes through)
Form Number 7HP19V-200
MODEL NUMBER IDENTIFICATION, 7HP19V, R-454B heat pump, RESIDENTIAL PRODUCT SPECIFICATIONS
June 2025 (printed on the document as "Form Number 7HP19V-200 | June 2025"). Published by ducanehvac.com. Fetched 2026-09-25. md5 3e58dea70ad7cca29b278e37f0821fb2, 3,346,572 bytes
Open it on the publisher's asset host (s7d9.scene7.com, the asset host ducanehvac.com publishes through)
Form Number A7HP14F-200
MODEL NUMBER IDENTIFICATION, A7HP14F, R-454B heat pump, RESIDENTIAL PRODUCT SPECIFICATIONS
October 2025 (printed on the document as "Form Number A7HP14F-200 | October 2025"). Published by armstrongair.com. Fetched 2026-09-25. md5 710134509fdcd3bdbce3d404082d64d0, 1,518,066 bytes
Open it on the publisher's asset host (s7d9.scene7.com, the asset host armstrongair.com publishes through)
Form Number 7HP14F-200
MODEL NUMBER IDENTIFICATION, 7HP14F, R-454B heat pump, RESIDENTIAL PRODUCT SPECIFICATIONS
January 2026 (printed on the document as "Form Number 7HP14F-200 | January 2026"). Published by ducanehvac.com. Fetched 2026-09-25. md5 dfc3da20ef22104180b561e09a0a807e, 1,838,526 bytes
Open it on the publisher's asset host (s7d9.scene7.com, the asset host ducanehvac.com publishes through)
Form Number A7CP21V-200
MODEL NUMBER IDENTIFICATION, A7CP21V, R-454B heat pump, RESIDENTIAL PRODUCT SPECIFICATIONS
October 2025 (printed on the document as "Form Number A7CP21V-200 | October 2025"). Published by armstrongair.com. Fetched 2026-09-25. md5 98008d4dc52e80407177f321c57899b6, 3,737,552 bytes
Open it on the publisher's asset host (s7d9.scene7.com, the asset host armstrongair.com publishes through)
Form Number A7SCP18V-100
MODEL NUMBER IDENTIFICATION, A7SCP18V, R-454B heat pump, RESIDENTIAL PRODUCT SPECIFICATIONS
April 2026 (printed on the document as "Form Number A7SCP18V-100 | April 2026"). Published by armstrongair.com. Fetched 2026-09-25. md5 43d715ac6a87f58c26c9eef3d19f9fd0, 3,510,599 bytes
Open it on the publisher's asset host (s7d9.scene7.com, the asset host armstrongair.com publishes through)
Form Number 7SCP18V-100
MODEL NUMBER IDENTIFICATION, 7SCP18V, R-454B heat pump, RESIDENTIAL PRODUCT SPECIFICATIONS
April 2026 (printed on the document as "Form Number 7SCP18V-100 | April 2026"). Published by ducanehvac.com. Fetched 2026-09-25. md5 e6b9c2399d0ef33f0cd7e2cd065d8c80, 3,503,854 bytes
Open it on the publisher's asset host (s7d9.scene7.com, the asset host ducanehvac.com publishes through)
Form Number 7SHP15V
MODEL NUMBER IDENTIFICATION, 7SHP15V, R-454B heat pump, RESIDENTIAL PRODUCT SPECIFICATIONS
May 2026 (printed on the document as "Form Number 7SHP15V | May 2026"). Published by ducanehvac.com. Fetched 2026-09-25. md5 ebdf6419abca1237e96d64702f58b610, 1,664,652 bytes
Open it on the publisher's asset host (s7d9.scene7.com, the asset host ducanehvac.com publishes through)
FORM NO. 4SHP16LS-100 (01/2021)
4SHP16LS PRODUCT SPECIFICATIONS 16 SEER SPLIT ENHANCED HEAT PUMP
01/2021. Published by s7d9.scene7.com. Fetched 2026-10-01. md5 a14cc16089bb00dc342b86cf226bf392, 1,614,130 bytes
FORM NO. 4SHP13LE-100 (12/2016)
4SHP13LE PRODUCT SPECIFICATIONS 13 SEER SPLIT SYSTEM HEAT PUMP
12/2016. Published by s7d9.scene7.com. Fetched 2026-10-01. md5 d2a4cc1aa33fb154e5ca6de0f7c3e6e8, 1,519,366 bytes
FORM NO. 4AC14-100 (06/2015)
4AC14 PRODUCT SPECIFICATIONS 14 SEER SPLIT SYSTEM AIR CONDITIONER
06/2015. Published by s7d9.scene7.com. Fetched 2026-10-01. md5 68bc3facd5859a6fbb2e9f282f3da2f1, 1,394,591 bytes
Rheem, Ruud, WeatherKing, Sure Comfort
These documents print a per-code tonnage table, so each tonnage is transcribed from the manufacturer's own table rather than calculated.
FORM NO. P22-844 REV. 1
Model Number Identification, RD16AY, Heat Pumps, Endeavor Line Achiever Plus Series Side-Discharge Heat Pump
REV. 1 (printed on the cover as "FORM NO. P22-844 REV. 1"). Published by files.myrheem.com. Fetched 2026-08-27. md5 7e3b9faf56fee788088569cb1b0c67e0, 797,900 bytes
FORM NO. A22-336 REV. 5
Model Number Identification, RA15AZ, Air Conditioners, Endeavor Line Achiever Plus Series iM Air Conditioners
REV. 5 (printed on the cover as "FORM NO. A22-336 REV. 5"). Published by files.myrheem.com. Fetched 2026-08-27. md5 63d72d0ee0c10b3d12cb86a8bb5bedcf, 1,656,054 bytes
Form No. M22-1090
Ruud Endeavor Line Achiever Plus Series iM Air Conditioners - RA15AZ Nomenclature
04/22 (printed in the footer as "Printed in the USA • 04/22 • Form No. M22-1090"). Published by files.myrheem.com. Fetched 2026-08-27. md5 91a661b59397918b9ae343359032fc35, 1,011,352 bytes
Whether this is the current revision is unconfirmed. Checked 2026-08-27.
FORM NO. ASC-220 REV. 6
Sure Comfort SA14 Air Conditioners
REV. 6 (printed on the document as "ASC-220 REV. 6"). Published by files.myrheem.com. Fetched 2026-08-27. md5 de02b1f611172e00f3fc468da168fd70, 674,267 bytes
FORM NO. A66-221 REV. 5
Model Number Identification/Available SKUs, WA13 Series, Air Conditioners
REV. 5 (printed on the document as "A66-221 REV. 5"). Published by files.myrheem.com. Fetched 2026-08-27. md5 fc6a3ea0e4420d0ab6670f6ea4f580eb, 382,422 bytes
P11-806 REV. 12
Rheem Classic® Series Heat Pump RP14 Series
REV. 12 (printed 4/20). Published by files.myrheem.com. Fetched 2026-10-01. md5 ef16bde3b180414174a5312fc38a971d, 744,919 bytes
FORM NO. A11-346 REV. 3
Endeavor® Line Classic® Series iM Air Conditioners RA14AY
8/26. Published by files.myrheem.com. Fetched 2026-10-01. md5 2fe99b553b30546b6999fe9107856253, 678,115 bytes
FORM NO. A11-215 REV. 2
Rheem Value Series Air Conditioners 14AJM Series
04/13. Published by pts.rheem.com. Fetched 2026-10-01. md5 bb035e6b22bfebfa7ea35e8ad279600a, 1,769,137 bytes
York, Luxaire, Coleman (HVAC), Fraser-Johnston, Guardian
These documents print a per-code tonnage table, so each tonnage is transcribed from the manufacturer's own table rather than calculated.
Form 6788932-YTG-A-0526
Technical Guide: YORK R-454B 14.3 SEER2 Split-System Air Conditioner - Single-Phase YC4
2026-05-06. Published by yorknow.com. Fetched 2026-07-26. md5 125d615c8719146442adfedffb897570, 2,116,043 bytes
Form 6788936-UTG-A-0526
Technical Guide: R-454B 14.3 SEER2 Split-System Air Conditioner - Single-Phase RC4
2026-05-06. Published by yorknow.com. Fetched 2026-07-26. md5 e36837ed9c952bcf7ea2d1fc6d4bed10, 2,045,545 bytes
Form 6552867-YTG-D-0226
YORK Technical Guide: YH4 Series - R-454B Outdoor Split-System Heat Pump
2026-02-04. Published by yorknow.com. Fetched 2026-07-26. md5 45e0e0efc791078f6aeb3974bde95902, 2,190,801 bytes
Form 6644185-UTG-C-0625
Technical Guide: R-454B Outdoor Split-System Heat Pump - XH4 3-phase
2025-06-26. Published by yorknow.com. Fetched 2026-07-26. md5 9a1ce3f3c26c7a251d0c8615bdce4fb8, 2,095,274 bytes
Form 6260578-YTG-C-0823
YORK Technical Guide: LX Series YC2E Models - 14.3 SEER2 Split-System Air Conditioner - Single-Phase
2023-08-02. Published by yorknow.com. Fetched 2026-07-26. md5 5ca1924d2b22038e439063d3034e715a, 4,812,249 bytes
Form 5581701-CTG-D-0420
TECHNICAL GUIDE LX SERIES SPLIT SYSTEM AIR CONDITIONERS 14 SEER – R-410A – 1 PHASE 1.5 THRU 5 NOMINAL TONS MODELS: TC4B18 THRU 60
revision D, date code 0420, as printed in the form number. Published by files.hvacnavigator.com. Fetched 2026-09-29. md5 93db480dcfef041e70780346f61d1fa4, 4,017,779 bytes
Form 6552871-UTG-D-0226
Technical Guide: RH4 Series - R-454B Outdoor Split-System Heat Pump
2026-02-04. Published by yorknow.com. Fetched 2026-07-26. md5 ce981252271911a64bba08b64a5cc8df, 2,055,012 bytes
Form 6601763-YTG-B-0725
YORK Technical Guide: LX Series YC6 Models - 16+ SEER2 Split-System Air Conditioner - Single-Phase
2025-07-31. Published by yorknow.com. Fetched 2026-07-26. md5 68ec41b1ba80bd491433ab6bdbe766bf, 2,072,260 bytes
Form 6515461-YTD-A-1225
Tabular Data Sheet: Modulating Split-System Heat Pumps, 19 SEER2, R-454B, Single-Phase
A revision, 12/25. Published by yorknow.com. Fetched 2026-07-26. md5 8a154970dea9b35449dd9368e7d682f5, 1,726,697 bytes
Intertherm, Miller, Gibson, Frigidaire, Maytag, Westinghouse, Tappan, Kelvinator
837G-0925
(the sheet prints no title; this is the publisher's own asset name, from the Content-Disposition of the download)
837G-0925, printed in the footer of its own page 2 beside www.nordyne.com. The portal's published date for the asset is 23 September 2025, which agrees with the 0925 suffix; the sheet prints no separate revision block.. Published by assets.nordyne.com. Fetched 2026-08-28. md5 c5541c40c139fcfdb7590fca4fa39fae, 248,858 bytes
840G-0925
MANUFACTURED HOUSING (the sheet's own printed heading; the publisher's asset name for it is Nordyne MH Product Identifier)
840G-0925, the form number the sheet carries. The portal's published date for the asset is 26 September 2025, which agrees with the 0925 suffix; the sheet prints no separate revision block.. Published by assets.nordyne.com. Fetched 2026-08-28. md5 844d165d7db4fdf0167401455f275ed6, 285,844 bytes
837F-0822
NGH Product Identifier (SEER2)
837F-0822. Published by assets.nordyne.com. Fetched 2026-10-01. md5 0d0e2616558b88194131e5d250283eab, 33,811 bytes
10502330
SPLIT SYSTEM AIR CONDITIONER 16 SEER INSTALLATION INSTRUCTIONS
(03/25). Published by assets.nordyne.com. Fetched 2026-10-01. md5 52d78e332b142f5354e1764ec7a608a8, 2,133,807 bytes
Mitsubishi Electric, Fujitsu, Gree, MrCool, Bosch, Samsung, Midea, Senville, Pioneer, Daizuki, Friedrich
AUU7RLF
Submittal Data: AUU7RLF, 7,000 BTU Compact Cassette, Inverter Driven Heat Pump
No revision block or edition is printed on the Fujitsu submittals. The only date they carry is a copyright line reading Copyright 2016 Fujitsu General America, Inc., which is not an edition, and the absence is recorded rather than filled with a guess.. Published by fujitsugeneral.com. Fetched 2026-08-28. md5 989742c55d7441f80002ca0de5f72728, 581,823 bytes
AUU12RLF
Submittal Data: AUU12RLF, 12,000 BTU Compact Cassette, Inverter Driven Heat Pump
No revision block or edition is printed. Copyright line reads Copyright 2016 Fujitsu General America, Inc., which is not an edition.. Published by fujitsugeneral.com. Fetched 2026-08-28. md5 7fc99707ca74d34590f72ca3ee749cfb, 582,795 bytes
AUU18RLF
Submittal Data: AUU18RLF, 18,000 BTU Compact Cassette, Inverter Driven Heat Pump
No revision block or edition is printed. Copyright line reads Copyright 2016 Fujitsu General America, Inc., which is not an edition.. Published by fujitsugeneral.com. Fetched 2026-08-28. md5 15d492f204150d3d89ed9de4e07ad886, 582,647 bytes
3VIR09HP230V1A
SUBMITTAL DATA: 3VIR09HP230V1A, Vireo Gen3 Wall Mounted Heat Pump System
Cover copyright line reads Gree Corporation 2022. No revision block is printed, and the address is capacity-keyed rather than revision-keyed.. Published by greecomfort.com. Fetched 2026-08-28. md5 1b593d311b11e82a21c039e6e3876927, 515,047 bytes
3VIR18HP230V1A
SUBMITTAL DATA: 3VIR18HP230V1A, Vireo Gen3 Wall Mounted Heat Pump System
Cover copyright line reads Gree Corporation 2022. No revision block is printed.. Published by greecomfort.com. Fetched 2026-08-28. md5 78ea64d0556c5931378af57592ec5245, 575,554 bytes
3VIR24HP230V1A
SUBMITTAL DATA: 3VIR24HP230V1A, Vireo Gen3 Wall Mounted Heat Pump System
Cover copyright line reads Gree Corporation 2022. No revision block is printed.. Published by greecomfort.com. Fetched 2026-08-28. md5 2aa97a2c063be612df5c8e453b5c99da, 552,779 bytes
SB_MSZ-GS09NA-U1_MUZ-GS09NAH-U1_202405
MSZ-GS09NA-U1 and MUZ-GS09NAH-U1 Wall-Mounted Heat Pump System submittal
202405 in the publisher's own filename. The sheet prints a copyright line reading 2023 Mitsubishi Electric Sales Canada Inc. and no revision block, so the edition is carried by the address and not by the page.. Published by mitsubishitechinfo.ca. Fetched 2026-08-28. md5 370bbebd5c9bc6756491ec3941757393, 898,911 bytes
SB_MSZ-GS12NA-U1_MUZ-GS12NAH-U1_202405
MSZ-GS12NA-U1 and MUZ-GS12NAH-U1 Wall-Mounted Heat Pump System submittal
202405 in the publisher's own filename; the sheet prints a 2023 Mitsubishi Electric Sales Canada copyright line and no revision block.. Published by mitsubishitechinfo.ca. Fetched 2026-08-28. md5 94140121ab7df5f21685a7ff42113f75, 898,598 bytes
SB_MSZ-GS15NA-U1_MUZ-GS15NAH-U1_202405
MSZ-GS15NA-U1 and MUZ-GS15NAH-U1 Wall-Mounted Heat Pump System submittal
202405 in the publisher's own filename; the sheet prints a 2023 Mitsubishi Electric Sales Canada copyright line and no revision block.. Published by mitsubishitechinfo.ca. Fetched 2026-08-28. md5 edddd4bb3bcd4e7c63507b58818fa33c, 900,083 bytes
mc-diy-4-br-en-01
MRCOOL 4th Generation DIY Series brochure
No edition or revision block is printed. The slug encodes the document TYPE and the generation (-br- for brochure, 4 for 4th Gen), never a revision.. Published by mrcool.com. Fetched 2026-08-28. md5 651bf58e02478c8cf36ed890a7db1e68, 2,182,766 bytes
mc-diy-es-4-ss-en-01
MRCOOL 4th Gen. DIY E Star Performance Specifications
No edition or revision block is printed. The slug encodes the document TYPE (-ss- for spec sheet) and the line (DIY-ES), never a revision.. Published by mrcool.com. Fetched 2026-08-28. md5 97e05e7acca80b82dbbc85b979e5f86d, 100,131 bytes
Floating Air A2L Select and Pro Submittal (06-26-2024)
Floating Air A2L Select and Pro Ductless Split Systems submittal
06-26-2024 in the publisher's own filename, while a revision date of 07-19-2024 appears inside the document. The address and the page disagree, and both are recorded rather than reconciled.. Published by friedrich.com. Fetched 2026-08-28. md5 b2932bd89fdba988fc131a43a4e371ff, 1,100,126 bytes
LG
These documents print the code's unit but no per-code tonnage table, so each tonnage is arithmetic on a manufacturer-stated unit rather than a transcribed value.
EM_SZ_HighEfficiency_WallMounted_11_22
Single Zone High Efficiency Wall Mounted Engineering Manual (Models LS090HSV5, LS120HSV5, LS181HSV5)
11_22 (printed in the document's own revision block, over "Supersedes: EM_SZ_HighEfficiency_WallMounted_10_22"). Published by legacy.lghvac.com. Fetched 2026-08-28. md5 acfc6636af9a1c93e9a192916567d015, 11,813,400 bytes
Whether this is the current revision is unconfirmed. Checked 2026-08-28.
EM_SZ_ArtCoolMirror_WallMounted_09_23
Single Zone Art Cool Mirror Wall Mounted Engineering Manual (Models LA090HSV5, LA120HSV5, LA181HSV5)
09_23 (printed in the document's own revision block, over "Supersedes: EM_SZ_ArtCoolMirror_WallMounted_11_22"). Published by legacy.lghvac.com. Fetched 2026-08-28. md5 c80f9942a0c555235f736f0a52a1725b, 12,215,813 bytes
Bard
These documents print a per-code tonnage table, so each tonnage is transcribed from the manufacturer's own table rather than calculated.
Form No. S3678-0626
MULTI-TEC W18A (1.5 TON) TO W72A (6 TON) 60 HZ, Wall-Mount Air Conditioner, Product Data
0626 (June 2026). Published by bardhvac.com. Fetched 2026-07-25. md5 67529ff2d83b567f99974817eb4b8b8b, 2,287,375 bytes
Open it on the publisher's asset host (share.sparkfive.com, the asset host bardhvac.com publishes through)
Form No. S3659-0326
WALL-MOUNT W18H (1.5 TON) TO W60H (5 TON) HEAT PUMP, Product Data
0326 (March 2026). Published by bardhvac.com. Fetched 2026-07-25. md5 50a9850246a4b25bcb4dcb78b777b2b4, 3,037,515 bytes
Open it on the publisher's asset host (share.sparkfive.com, the asset host bardhvac.com publishes through)
Form No. S3595-1124
11EER WA SERIES WALL-MOUNT, W18A - W72A, 208V - 460V 60hz, Air Conditioner Specifications
1124 (November 2024). Published by bardhvac.com. Fetched 2026-07-25. md5 fb7899ce91390604064b799f6a816464, 2,030,057 bytes
Open it on the publisher's asset host (share.sparkfive.com, the asset host bardhvac.com publishes through)
Form No. S3586-1123
11EER WA SERIES WALL-MOUNT, W12A, One Ton Air Conditioner Specifications
1123 (November 2023). Published by bardhvac.com. Fetched 2026-07-25. md5 1df84f543204ebb36a26f9f67d025b3c, 830,364 bytes
Open it on the publisher's asset host (share.sparkfive.com, the asset host bardhvac.com publishes through)
Form No. S3565-0525
10EER WA SERIES WALL-MOUNT, W090A - W180B MEGA-TEC, Product Data
0525 (May 2025). Published by bardhvac.com. Fetched 2026-07-25. md5 6e7b3943b17f7378496b755212fcf424, 5,816,378 bytes
Open it on the publisher's asset host (share.sparkfive.com, the asset host bardhvac.com publishes through)
Worked Examples
4TTR4036N1000Trane3 tons
Position 1: digit 4 = R-410A (2 = R-22, 5 = R-454B). Position 2: T = Trane. Position 3: T = split AC condenser (W would be a heat pump). Position 5: digit 4 = SEER class 14. Position 6: 0 = brazed field connection, not part of the capacity. Positions 7-8: 36 = 36,000 BTU/h = 3 tons. Per Trane's own Model Nomenclature diagram in Product Data 4TTR4-L (22-1904-1M-EN).
GSX130361Goodman3 tons
G = Goodman, S = split system, X = R-410A condenser (the older GSC line was R-22). Digits 13 = 13 SEER. Then 036 = 36,000 BTU/h = 3 tons, and the trailing 1 = 208/230V single phase. Per Goodman's SS-GSX14 nomenclature, which prints 13 as "13 SEER".
24ACC636Carrier3 tons
Leading 24 = AC condenser (25 = heat pump, 58/59 = gas furnace). ACC = series letters. The digit 6 before the capacity code = 16 SEER (Carrier's 2016 Nomenclatures prints 6 = 16.0 for its air conditioners). Final 36 = 36,000 BTU/h = 3 tons. The 24 and 25 families carry no refrigerant digit, so it follows from series and manufacture year; Carrier's R-454B 26SCA5 and 27SCA5 series print it at positions 1-2. Per Carrier's 2016 Nomenclatures.
MSZ-GL15NAMitsubishi Electric1.25 tons (pattern-based estimate)
Mini splits skip the divisible-by-6 ladder and print the BTU class directly: 12 = 12,000 BTU/h, which is 1 ton. Fujitsu's own AUU12RLF submittal prints Nominal Cooling 12,000 Btu/h, and MrCool's 4th Generation sheet prints 36,000 for DIY-36. The class is the name on the box, not a measured rating, and these makers' own tables show the difference: Gree names 3VIR24HP230V1A a 24 and rates it 22,000 Btu/h, Mitsubishi names MSZ-GS15NA-U1 a 15 and rates it 14,000, MrCool names DIY-24 a 24 and rates it 23,000. Friedrich rates its A2L line at exactly the class. Fujitsu also sells single-digit classes this tool refuses rather than guesses at, because it only reads capacity runs of two or three digits. Watch LG: it prints thousands of BTU/h like the rest of this list, and its capacity cell carries a third character LG's own legend does not define, which is why LS181HSV5 is 18,000 BTU/h and not 18,100.
Why Furnace Model Numbers Break the Rule
Gas furnace model numbers encode a heating input size (codes such as 070, 090 and 110), and the maker's book gives the BTU/h each code stands for. Many also carry a blower airflow code (16 = 1,600 CFM class) that looks like a capacity code. Neither number is cooling tonnage. Carrier flags its furnaces with the model prefixes 58 and 59, and this decoder reports those as furnaces instead of guessing a tonnage. For system cooling capacity, always decode the outdoor unit's model number. The 060 code is the one collision to watch: on an outdoor unit it means 5 tons of cooling; on a furnace it is a heating input size.
Frequently Asked Questions
How many tons is a 036 model number?
3 tons. The 036 capacity code means 36,000 BTU/h nominal, and one ton of cooling equals 12,000 BTU/h, so 036 divided by 12 is 3 tons. The same math covers the whole residential ladder: 018 = 1.5 tons, 024 = 2, 030 = 2.5, 036 = 3, 042 = 3.5, 048 = 4, and 060 = 5 tons.
Do I use the model number or the serial number to find tonnage?
The model number. It describes what the unit is: capacity, and on many brands the SEER class and refrigerant generation. The serial number describes when the unit was built and carries no capacity information. If you need the unit's age or refrigerant era, decode the serial number instead with our serial number lookup tool.
Where is the model number on the nameplate?
On the data plate (rating plate), a metal or foil sticker on the outdoor unit's side panel near the refrigerant line connections, or inside the front panel on indoor equipment. It is labeled M/N, MODEL, or MODEL NO., usually printed directly above or beside the serial number. Use the outdoor unit's model for system cooling capacity; indoor air handlers and coils carry their own numbers.
Does the model number show the SEER rating?
On many brands, yes, as a rounded class rather than the exact rating. Trane and American Standard carry a SEER digit in position 5 (4TTR4 is a 14 class), Goodman and Amana spell it out (GSX16 = 16 SEER), Rheem's older nine-field layout uses positions 3-4 (RA14 = 14 SEER), and Carrier encodes it as a single digit in lettered series (24ACC6 = 16 SEER in Carrier's 2016 Nomenclatures). Lennox gives it a dedicated position on the current R-454B line (the two digits after the SL/EL/ML tier, which Lennox labels Nominal Efficiency rather than SEER or SEER2); its older series names carry a number (XC21) that this tool does not publish as a SEER. This tool shows the class only where a maker sheet it reads prints those digits for that model's family. The exact SEER2 rating for a matched system is on the AHRI certificate, not in the model number.
Do the indoor and outdoor model numbers have to match in size?
They should be a rated match, which is not always the same digits. A 036 condenser is often paired with an 037 or 042 coil or air handler, and manufacturers publish approved combinations through AHRI. Mismatched capacity between indoor and outdoor sections costs efficiency and can hurt dehumidification, so verify the pairing in the AHRI directory rather than assuming equal codes.
My furnace model has 070 or 090 in it. Is that tonnage?
No. Furnace model numbers encode a heating INPUT size (a code such as 070 or 090; the maker's book gives the BTU/h each one stands for, and they do not all read it the same way). Some furnace models also carry a blower airflow code (16 = 1,600 CFM class) that can be misread as a capacity code. Cooling tonnage for a split system lives in the outdoor unit's model number. Carrier makes this easy to spot: model prefixes 58 and 59 are gas furnaces.
Can I size the replacement system from the old unit's tonnage?
Treat the old tonnage as a starting clue, not an answer. Industry studies have found a large share of residential systems oversized, and an oversized unit short-cycles, dehumidifies poorly, and wears out faster. The original unit may also have been sized before insulation, window, or envelope changes. Run a load calculation first: our BTU calculator estimates the load from climate zone, square footage, insulation, and windows, and a Manual J from your contractor settles it.
What if two digit groups in my model number both look like capacity codes?
It happens, especially with voltage blocks (230, 208) and series numbers next to the real capacity code. This decoder ranks every plausible group and shows its reasoning instead of guessing silently: 3 digit zero-padded groups like 036 outrank bare pairs, and leading digits are usually a product family code, not capacity. When the brand is selected, the brand's documented position wins. If two readings survive, check the nameplate's RLA or BTU/h rating to break the tie.
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Gas Pipe Sizing Calculator
Decoded a gas furnace? Its nameplate input is what the gas piping has to carry. Sizes every section of the system rather than one pipe, natural gas or propane.
BTU / HVAC Load Calculator
Size the actual cooling and heating load by climate zone, insulation, windows, and duct location. Check it against the decoded nominal tonnage.
Superheat & Subcooling Calculator
Verify the charge once you know what you are working on. PT interpolation for 11 refrigerants including R-454B and R-32.
MCA / MOCP Breaker & Wire Size Calculator
Got the tonnage? Size the circuit next: enter the nameplate MCA and MOCP and get wire, breaker, ground, and voltage drop per NEC Article 440.
Decoded a central system's tonnage? Check it against the house's load.
The old unit's nominal size is a clue, not a load calculation. Oversized systems short-cycle and dehumidify poorly. For central equipment that conditions the whole house, run the load numbers before you match a replacement. A PTAC, a single package vertical unit, a room air conditioner or one unit of a VRF system conditions a room or a zone, which this load calculator does not size.