Cold Climate Heat Pump Capacity
Bosch IDS (ducted): Heating Capacity at 5F and Below
The MAX heating capacity the Bosch IDS (ducted) holds as it gets cold, from the AHRI-certified NEEP record (AHRI 208128224), with the maintained-% and a balance-point readout.
MAX Capacity by Temperature
| Outdoor temperature | Type | Heating capacity |
|---|---|---|
| 47F | RATED | 34,200 BTU/hr |
| 47F | MAX | 36,600 BTU/hr |
| 17F | MAX | 24,600 BTU/hr |
| 5F | MAX | 21,800 BTU/hr |
The “will it heat my house at 5F” answer is the MAX at 5F (21,800 BTU/hr), shown next to the rated 47F capacity so you see both. Capacity below 5F is not published for this line, so it is not extrapolated here.
Maintained Capacity at 5F
At 5F the Bosch IDS (ducted) holds 21,800 BTU/hr. That is 63.7% of its rated 47F capacity (21,800 / 34,200), and 59.6% of its MAX 47F capacity (21,800 / 36,600). Both are true; the denominator is always stated. NEEP floors its stored percentage to a whole number (63% and 59% respectively); the computed ratio is shown above.
Balance Point & Backup Heat
The balance point is where this model's declining capacity curve crosses the load line, which runs from zero at 65F to your full design load at the design temperature. Enter your own design heat load in the calculator below for your numbers. This is a readout, not a substitute for a Manual-J load calculation.
Run It for Your Temperature and Load
Source
Capacity and COP transcribed from the AHRI-certified NEEP cold-climate air-source heat pump database, pinned to AHRI certificate 208128224 for outdoor unit BOVA-36HDN1-M15G: NEEP ccASHP record, accessed 2026-07-11. The manufacturer engineering data or a Manual-J by an HVAC pro has the final say.
A mainstream ducted inverter heat pump. It falls off harder in the cold than a dedicated cold-climate unit: 21,800 at 5F is 63.7% of its 34,200 rated capacity, and the NEEP record does not rate it below 5F. Bosch markets an IDS Ultra as 100% at 5F, but that string is not a NEEP outdoor-unit number, so it is not published here.
Frequently Asked Questions
What is the Bosch IDS (ducted) heating capacity at 5F?
The Bosch IDS (ducted) puts out 21,800 BTU/hr MAX at 5F, which is 63.7% of its 34,200 BTU/hr rated capacity at 47F (and 59.6% of its 36,600 MAX at 47F). This is the number that answers whether it can heat your house on a cold day. Pinned to AHRI certificate 208128224.
How low can the Bosch IDS (ducted) operate?
The AHRI-certified NEEP record rates the Bosch IDS (ducted) down to 5F, its lowest published row (21,800 BTU/hr). Capacity below 5F is not published for this line, so it is not extrapolated here; read the manufacturer submittal for any lower-temperature data.
What is the Bosch IDS (ducted) COP at 5F?
The COP at MAX capacity at 5F is 1.88. That is the coefficient of performance at the maximum output the unit reaches at 5F. Only the MAX-capacity COP is published here; the minimum-output COP at extreme lows is artifactual and is not a useful cold-weather figure.
What is the balance point for the Bosch IDS (ducted)?
It depends on your home's heat loss. Against a 45,000 BTU/hr design load at 5F, the Bosch IDS (ducted) balances at 26.9F and needs 23,200 BTU/hr (6.8 kW) of backup heat at the 5F design temperature. Enter your own load in the calculator for your balance point. A Manual-J load calculation has the final say.
Other Cold-Climate Heat Pumps
Mitsubishi P-Series Hyper-Heat (ducted)
38,000 BTU/hr at 5F (95% of rated).
Fujitsu AIRSTAGE XLTH (wall ductless)
23,200 BTU/hr at 5F (96.7% of rated).
Carrier Performance (ducted)
26,200 BTU/hr at 5F (82.4% of rated).
Daikin Aurora (wall ductless)
21,600 BTU/hr at 5F (100% of rated).
LG Ceiling / ducted (R-32)
36,000 BTU/hr at 5F (90% of rated).
Gree FLEXX (ducted, R-32)
25,000 BTU/hr at 5F (100% of rated).
MRCOOL Universal (ducted DIY)
22,000 BTU/hr at 5F (91.7% of rated).
Capacity at 5F Chart (All Models)
Every line on one table: rated 47F, MAX at 17F and 5F, the cold floor, and COP.
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