01
Start with the room
Note where and when you notice dust, pollen, pet dander, stuffiness, dry winter air, condensation or a recurring odor. Record recent changes such as renovations, new furnishings or a different filter.
02
Know your filter
Record the size, model and replacement date. Check that the filter fits without gaps. Ask a qualified technician before increasing its efficiency.
03
Follow moisture to its source
Look for visible leaks, condensation and persistently damp materials. Exhaust bath and cooking moisture outdoors. Active water entry and contaminated materials need appropriate specialist attention.
04
Plan cleaner air in the rooms you use
Prioritize a bedroom or living space, match any room air cleaner to its size, keep airflow clear and follow the filter replacement schedule. Reduce particle sources where practical.
05
Measure before adding winter moisture
Check humidity before choosing a humidifier. Avoid exceeding 50% relative humidity, and reduce the setting or use if condensation appears on windows or walls. Follow the equipment’s cleaning and maintenance instructions.
06
Take unexplained symptoms to a clinician
Feeling unwell at home can have many causes. Seek medical advice for unexplained or persistent symptoms. A home-air review can complement that care, but cannot diagnose an illness. Do not put symptom histories or diagnoses in a service request.
07
Keep safety tests separate
CO alarms, qualified combustion checks and proper radon testing have specific jobs. A consumer air monitor does not replace them. If a CO alarm sounds or you suspect exposure, get outside and call 911.
08
Ask for proof of the work
Request a written scope with quantities and exclusions, then the relevant before-and-after leakage, airflow or other measurements.
Read the source: EPA guide to air cleaners ↗
Read the source: EPA moisture guide ↗
Read the source: EPA humidifier guidance ↗
Read the source: EPA indoor air and health guidance ↗
Prepared by Happy Homes, September 2026. Educational guidance; not an inspection or safety certification.