Source: https://guthlabs.ai/docs/instruments/overall-heat-transfer-coefficient-u-calculator/qualification/

instrument qualification / verified-with-binding-errata

# Overall Heat Transfer Coefficient (U) Calculator qualification

Verified with errata that must be applied at binding time.

Status: **VERIFIED_WITH_ERRATA**Lifecycle: **verified-with-binding-errata**

## Ledger verdict

Verified with errata that must be applied at binding time.

**Status**: VERIFIED_WITH_ERRATA

**Tranche**: tranche-4

**Review vectors**: 4

**Ledger rows**: 1

## Applied errata

````
[
  {
    "vector": 2,
    "field": "UA/Ui/Uo",
    "wrong": "UA 14.033, Ui 44.668, Uo 37.224",
    "correct": "UA 13.113, Ui 41.740, Uo 34.783",
    "cause": "the specified Rfouling=0.005 K/W omitted from her own resistance sum (removal reproduces her numbers exactly)"
  }
]
````

## Adversarial re-test context

The full catalog was re-tested from boundary, convention, and self-check angles in 2,787 requests. Five genuine computational defects were independently verified and corrected. This page reports the current ledger state for this instrument; it does not imply product deployment or interface qualification.

## Release gate

Bind every attached correction, replay the affected vectors, enforce boundary validation, and preserve evidence before describing the executable surface as qualified.

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/overall-heat-transfer-coefficient-u-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/overall-heat-transfer-coefficient-u-calculator/mechanism/>)[03**Implementation**](<https://guthlabs.ai/docs/instruments/overall-heat-transfer-coefficient-u-calculator/implementation/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `STRESS_TEST_RECEIPT.json`

- `tranche errata record`