Intry Verified receipt
Is the Intry A2L Refrigerant Charge Limit Calculator accurate?
The provenance receipt for the Intry A2L Refrigerant Charge Limit 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, rebuilt from their cited source.
The receipt
- Calculated from
- UL 60335-2-40 (4th ed) Annex GG · ANSI/ASHRAE 15.2-2024 · ASHRAE 34-2019 Addendum f (LFL values) · IEC 60335-2-40 ed 6 / EN 378 (gravity-only) (UL 60335-2-40 4th ed / ANSI/ASHRAE 15.2-2024). Reused verbatim 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
- UL 60335-2-40 4th ed / ANSI/ASHRAE 15.2-2024
- Checked
- Before any release, an automated check runs the locked engine that produces these figures and holds its answers against values 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 30959 checks, and this page has to clear them too. This is our own deterministic gate, not a third-party audit.
- Runnable
- Exposed at the Intry MCP endpoint. An AI assistant can run this calculator, and before each release an automated check confirms the answer it returns is identical to the one the website's own engine produces.
- Final say
- The equipment listing and the manufacturer's installation manual for your exact unit, plus your AHJ, have final say.
Frequently Asked Questions
Is the Intry A2L Refrigerant Charge Limit Calculator accurate?
It computes from the sources listed in the source receipt on its tool page (UL 60335-2-40 4th ed / ANSI/ASHRAE 15.2-2024), 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 equipment listing and the manufacturer's installation manual for your exact unit, plus your AHJ, have final say. Every figure an Intry calculator computes comes from a locked source module, not hand-typed. 30959 automated checks, one suite for the whole site rather than a per-tool count, re-derive the numbers before each deploy from the tables this site transcribed from the UL 60335-2-40 and ANSI/ASHRAE 15.2-2024 standards it came from. This is our own deterministic gate, not a third-party audit. The per-tool receipt is public at https://www.intrysys.com/verified.