Intry Verified receipt
Is the Intry BTU / HVAC Load Calculator accurate?
The provenance receipt for the Intry BTU / HVAC Load 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 ACCA Manual J basis 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
- ACCA Manual J (simplified): the load model · ACCA Manual S, Table N2-1: the equipment-fit window · IECC 2021 climate zones (the zone boundaries only) · ACCA Manual S (equipment fit) · NREL/TP-5500-60801 (November 2014): the oversizing energy penalty, and its scope · ENERGY STAR Room Air Conditioner sizing table. 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
- 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
- A full Manual J on the actual house has final say.
Frequently Asked Questions
Is the Intry BTU / HVAC Load 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 ACCA Manual J basis 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.