Measures air velocity or terminal airflow.
Best use
Use the tool to create a repeatable observation, not to replace context. Record model, settings, location and a comparison point.
Common mistake
Treating one display value as a universal pass/fail result. Building materials and instruments have different response characteristics.
Useful output
Save the reading or image in a timeline so it can be compared after weather, occupancy or repair changes.
Observe→Distinguish→Control source→Verify
Living dossierPublished knowledge is connected and improved as new cases, images and outcomes are added. Updated 2026-07-20.
