Intry Verified receipt
Is the Intry Superheat & Subcooling Calculator accurate?
The provenance receipt for the Intry Superheat & Subcooling 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
- CEC-400-2022-010-AP, Reference Appendix RA3 Table RA3.2-1 (Installer Testing at Final) · CEC-400-2022-010-AP, Reference Appendix RA3 Table RA3.2-2 (target superheat) · CEC-400-2022-010-AP, Joint Appendix JA6.1.6.3 (the airflow precondition) · Carrier PH5SAN5, Carrier SM10-R454B-03, Carrier 25SCA5, Goodman IOG-4048C, ICP 428 01 5106 00, Trane 88-M5MHWUN-1A-EN, Rheem RD16AY, and Bosch service literature · The per-machine charge-target corpus (registered manufacturer books, cited by form number) · The heat pump's heating-mode check (each maker's own heat pump book, cited by form number and page) · York ST-022-12, Figures 1 and 2 (example charging charts) · Rheem RD16AY / RD18AY section 5.7, and Lennox 13ACX 506374-01 page 20 · Copeland discharge-temperature guidance, and Proctor Engineering on airflow and capacity · The manufacturer installation books these steps quote. 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
- CEC Title 24 Tables RA3.2-1 (installer compliance criteria) and RA3.2-2 (fixed-orifice target superheat); the rest is manufacturer data and physics
- 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 unit nameplate and the manufacturer's charging chart have final say.
Frequently Asked Questions
Is the Intry Superheat & Subcooling 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 unit nameplate and the manufacturer's charging chart 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 locked modules each figure is traced to: the manufacturer PT tables behind the saturation temperatures, superheat and subcooling, and the transcribed code and service-literature constants behind the charge, metering, airflow, approach and discharge line figures, each quoted with its own source in the panel it appears in. This is our own deterministic gate, not a third-party audit. The per-tool receipt is public at https://www.intrysys.com/verified.