Common indoor sources
Potential indoor pollutants include tobacco smoke, combustion byproducts, cleaning chemicals, building materials, allergens, mold-related particles and outdoor pollution that enters the home. The important first step is identifying the source rather than buying a device blindly.
Source control and ventilation
EPA guidance generally places source control and ventilation among the core strategies for improving indoor air. Fix moisture problems, avoid indoor smoking, use exhaust where appropriate and ventilate when outdoor conditions allow.
What filters can and cannot do
Air cleaners can reduce some airborne particles, but no portable device removes every pollutant. Performance depends on filter type, room size, airflow and the pollutant of concern.
When symptoms need medical evaluation
Persistent wheezing, chest pain, severe shortness of breath or symptoms that worsen around a particular environment deserve professional evaluation. Environmental changes should complement, not replace, needed medical care.
References & further reading
- EPA — Indoor Air Quality — indoor-air-quality guidance
- EPA — Air Cleaners and Air Filters in the Home — home air-cleaner guidance