The core idea
Sensors near windows, vents, exterior walls or direct sun may describe a local microclimate rather than the whole room.
How the mechanism works
Radiation, airflow and surface proximity affect local temperature, humidity and particle readings.
When it becomes relevant
Typical trigger: Daily sun, HVAC cycles or cold weather.
Evidence that supports this interpretation
- Moving to a representative location changes the baseline
- Several sensors reveal gradients
- The local condition matches the symptom location
Evidence that weakens it
- All locations agree
- The device is faulty
- The question is specifically about the local surface
What this concept cannot prove alone
A single observation, image or meter reading cannot confirm the complete failure pathway. Use this concept to form better questions, compare alternatives and decide which safe observation would be most informative next.
Safety and professional boundary
Measurement placement should match the decision being made; there is no universal best location for every question.
Primary references for this topic family
These references ground the general building-science or safety context. They do not diagnose a specific house, replace local requirements or certify a repair.
