Ozone or metallic electrical odor

Sharp metallic smell sometimes associated with arcing, motors or electrical equipment.

First distinction

Note where the odor is strongest, whether it appears with rain, wind, heating, plumbing or ventilation, and whether closing a door changes it.

Do not mask the pattern

Fragrance can make the pathway harder to identify. Record timing before cleaning or moving stored material.

Next useful step

Treat this as a safety signal. Stop normal investigation and follow the applicable emergency or professional guidance.