12 complete symptom paths42 guides and 60 questions in each1,460 Grade A articlesOne searchable, connected knowledge library140 official sourcesEvidence context with explicit limits
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 →
Organic decay01

Dead-animal odor

Strong decay odor rises, peaks and then changes over days.

Trigger
time after animal entry
Strongest location
wall, attic, crawl or duct void
Open signal profile →
Sensory method

Describe first. Interpret second.

  1. TriggerWhat changed immediately before it began?
  2. CycleDoes it follow startup, flow, heating, wind or room use?
  3. LocationWhere is it strongest, and does that move?
  4. Stop conditionHeat, smoke, gas or electrical odor changes the response immediately.