Intry Verified receipt
Is the Intry Static Pressure & Friction Rate Calculator accurate?
The provenance receipt for the Intry Static Pressure & Friction Rate 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. 27820 automated checks re-derive and source-check the numbers against the ACCA Manual D friction-rate standard it was computed 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 D friction-rate relation · Total effective length inputs (Manual D Appendix 3). 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 27820 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
- The blower's measured external static pressure and a full ACCA Manual D duct design have final say.
Frequently Asked Questions
Is the Intry Static Pressure & Friction Rate Calculator accurate?
Every figure an Intry calculator computes comes from a locked source module, not hand-typed. 27820 automated checks re-derive and source-check the numbers against the ACCA Manual D friction-rate standard it was computed 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.