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.
Short answer: Every figure an Intry calculator computes comes from a locked source module, not hand-typed. 23740 automated checks re-derive and source-check the numbers against the UL 60335-2-40 and ANSI/ASHRAE 15.2-2024 standards it came from before each deploy. This is our own deterministic gate, not a third-party audit. The per-tool receipt is public at https://www.intrysys.com/verified.
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.
- Checked
- Before any release, an automated check rebuilds the calculated figures from the locked engine that produces them and holds each one against the source it cites, so a number answers to its source and not merely to itself. As of the current build that suite holds 23740 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?
Every figure an Intry calculator computes comes from a locked source module, not hand-typed. 23740 automated checks re-derive and source-check the numbers against the UL 60335-2-40 and ANSI/ASHRAE 15.2-2024 standards it came from before each deploy. This is our own deterministic gate, not a third-party audit. The per-tool receipt is public at https://www.intrysys.com/verified.