Intry Verified receipt
Is the Intry Vacuum Decay Test Calculator accurate?
The provenance receipt for the Intry Vacuum Decay Test Calculator: the exact authority its values derive from, the edition they are keyed to, who has final say, and what our automated checks hold them against.
The receipt
- Calculated from
- The installation instructions for your equipment (the hold criterion) · Trane Installer's Guide, Condensing Units, 18-AC98D1-5-EN (4TTR6018-061) · Goodman / Amana Condensing Unit Installation & Service Reference, IOG-4036B, December 2022 · York Installation Manual, R-410A 2-Stage Outdoor Split-System Heat Pump, 5391577-UIM-B-0718 (YZT, HC19B, HL19B) · Rheem / Ruud Variable Speed R-454B Heat Pump Outdoor Units Installation Instructions, 92-110354-01-01 · Carrier 26SCA5 Installation Instructions, 26SCA5-1SI, Edition Date 06/24 · Daikin Room Air Conditioner Installation Manual, 3P740830-1B · Daikin VRV Commissioning Guide (a training handbook, not an installation manual), VRV III Pre-Commissioning Check #3 · NIST Chemistry WebBook, Antoine parameters for water (Bridgeman & Aldrich, 1964) · The manufacturer installation books these steps quote. Reused word for word from the locked engine, never re-written for this page. The documents it rests on are listed in the source receipt on the tool page.
- Edition
- not a code table
- What it reads
- The installation instructions for your equipment (the hold criterion)
- Trane Installer's Guide, Condensing Units, 18-AC98D1-5-EN (4TTR6018-061)
- Goodman / Amana Condensing Unit Installation & Service Reference, IOG-4036B, December 2022
- York Installation Manual, R-410A 2-Stage Outdoor Split-System Heat Pump, 5391577-UIM-B-0718 (YZT, HC19B, HL19B)
- Rheem / Ruud Variable Speed R-454B Heat Pump Outdoor Units Installation Instructions, 92-110354-01-01
- Carrier 26SCA5 Installation Instructions, 26SCA5-1SI, Edition Date 06/24
- Daikin Room Air Conditioner Installation Manual, 3P740830-1B
- Daikin VRV Commissioning Guide (a training handbook, not an installation manual), VRV III Pre-Commissioning Check #3
- NIST Chemistry WebBook, Antoine parameters for water (Bridgeman & Aldrich, 1964)
- The manufacturer installation books these steps quote
- Checked
- Checked on every build, most recently on November 11, 2026. On every build, an automated check runs the locked engine that produces these figures and holds its answers against the values this site holds, written from the source it cites, so a checked number answers to its source and not merely to itself. The check covers the cases someone wrote a check for, not every input the tool accepts: it tells you where a number comes from, and it is not a proof of every value. As of the current build that suite holds 35,006 checks, and this page has to clear them too. This is our own deterministic gate, not a third-party audit.
- Tested safeguards
- Its refusal of a reading still rising where the maker asks for a steady one, the strict limit of a maker that asks for less than its figure, which criterion it applies and how its saved and copied reading states it, the setup confirmed and the figures it prints, the hold figures of an older link, the phone's reading of a link sent to it, and the clearing of a link's confirmations once a figure changes, carry their own safeguards: when the code behind them is broken on purpose, the safeguards catch it.
- Source changes
- No source has been added to or removed from this tool since this record began on October 24, 2026.
- Runnable
- A reference engine behind the published numbers on this site. Runnable access is offered on the calculators exposed at the Intry MCP endpoint.
- Final say
- The installation instructions for your equipment have final say on the hold criterion, and a nitrogen pressure test is what locates a leak. A system that holds a vacuum has not been pressure tested.
Frequently Asked Questions
Is the Intry Vacuum Decay Test Calculator accurate?
It computes from the sources listed in the source receipt on its tool page, and our automated checks hold its answers against values written from those sources for the cases the checks cover, not for every input you can enter. The installation instructions for your equipment have final say on the hold criterion, and a nitrogen pressure test is what locates a leak. A system that holds a vacuum has not been pressure tested. Every figure an Intry calculator computes comes from a locked source module, not hand-typed. 35,006 automated checks, one suite for the whole site rather than a per-tool count, re-derive those figures and re-check the manufacturer method this tool applies before each deploy. The standard it judges your reading against is the hold criterion in the installation instructions for your equipment, which you supply, judged alongside the vapor pressure of water derived from the NIST Antoine coefficients, so no check of ours can confirm that what you entered is what is printed on your equipment. This is our own deterministic gate, not a third-party audit. The per-tool receipt is public at https://www.intrysys.com/verified.