Smell the pathway
Smell Atlas
Follow the pathway, not only the label.
Onset, duration, airflow and nearby systems often separate moisture, drainage, combustion and electrical sources.
Describe your clue →Pressure-driven drain gas01
Sewage odor during windy weather
Direction-specific occurrence points to pressure at the venting system.
- Trigger
- wind
- Strongest location
- roof vent, trap or pipe opening
Sensory method
Describe first. Interpret second.
- TriggerWhat changed immediately before it began?
- CycleDoes it follow startup, flow, heating, wind or room use?
- LocationWhere is it strongest, and does that move?
- Stop conditionHeat, smoke, gas or electrical odor changes the response immediately.
