Intry Verified receipt
Is the Intry R-134a Chiller Retrofit Eligibility accurate?
The provenance receipt for the Intry R-134a Chiller Retrofit Eligibility: 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. 28314 automated checks re-derive and source-check the numbers against the EPA SNAP centrifugal-chiller listing and the OEM conversion bulletin it was read 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
- EPA SNAP, Substitutes in Centrifugal Chillers (page last updated March 19, 2026) · Johnson Controls / YORK SI0389 (226) and SI0390 (919) · Chemours Opteon XP10 Retrofit Guidelines C-10302 (11/15) and Product Information C-10020; Honeywell R-513A chiller retrofit guide (2023) · Chemours Opteon XP30 C-10864; AGC AMOLEA 1224yd Technical Information (2019); Honeywell Solstice N13 retrofit guideline · This site's CoolProp 8.0.0 cycle model, and 40 CFR 84.106(b) and 84.54. 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 28314 checks, and this page has to clear them too. This is our own deterministic gate, not a third-party audit.
- 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
- EPA's SNAP listing decides whether the retrofit is a listed use; the chiller's manufacturer has final say on whether a given machine can be converted and what tonnage it makes afterward; a Section 608-certified technician does the work.
Frequently Asked Questions
Is the Intry R-134a Chiller Retrofit Eligibility accurate?
Every figure an Intry calculator computes comes from a locked source module, not hand-typed. 28314 automated checks re-derive and source-check the numbers against the EPA SNAP centrifugal-chiller listing and the OEM conversion bulletin it was read 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.