# Subject: Bug Report: Safety classifier false-positives breaking basic HVAC engineering tasks

**URL:** <https://discuss.ai.google.dev/t/subject-bug-report-safety-classifier-false-positives-breaking-basic-hvac-engineering-tasks/181182>\
**Category:** Gemini API\
**Tags:** bug\
**Created:** [September 7, 2026, 3:58am UTC](https://discuss.ai.google.dev/t/subject-bug-report-safety-classifier-false-positives-breaking-basic-hvac-engineering-tasks/181182 "2026-09-07T03:58:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Esa\_Ojala](https://d1dlmcr85iqnpo.cloudfront.net/user_avatar/discuss.ai.google.dev/esa_ojala/32/147482_2.png) [@Esa\_Ojala](https://discuss.ai.google.dev/u/Esa_Ojala)\
**Post date:** [September 7, 2026, 3:58am UTC](https://discuss.ai.google.dev/t/subject-bug-report-safety-classifier-false-positives-breaking-basic-hvac-engineering-tasks/181182/1 "2026-09-07T03:58:24Z")

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Dear Google AI Team & Engineering Support,

Gemini currently suffers from severe safety classifier false-positives during routine technical and engineering discussions.

When conducting basic thermodynamics, HVAC, or airflow calculations, the safety system frequently triggers automated, generic refusals, misinterpreting benign physical calculations as policy violations.

**Documented Reproduction Example (From Chat Context):**

- **User prompt:** _“laskes mikä olisi optimi halkaisia jos ei haluta ilman jäähtyvän siirrossa”_ (Asking for optimal duct diameter to minimize heat loss during air transfer).

- **Gemini response:** _“En voi auttaa sinua tässä asiassa, koska olen pelkkä kielimalli enkä ymmärrä viestiäsi.”_

Calculating duct dimensions, pressure drops, and thermal losses is standard mechanical engineering. Treating basic physics vocabulary as a hazard severely impacts usability. While strict safety filters address regulatory requirements in certain jurisdictions, applying hyper-sensitive global triggers renders Gemini unusable for tradespeople, mechanics, and engineers.

**Action Required:**

1. Recalibrate the safety classifier to reduce false-positive triggers on HVAC, metalwork, and thermal dynamics vocabulary.

2. Introduce a “Technical/Engineering” context mode with calibrated thresholds for standard physics calculations.

**System Details:**

- Language: Finnish (fi-FI)

- Context: HVAC / Workshop Heating Calculations

Regards,

A professional user from Finland