Many factors can affect indoor air quality, and not all of them are noticeable. Those with allergies or asthma will certainly feel allergens and contaminants in the air, but what about for everyone else?
The humidity level is undoubtedly the most noticeable symptom of poor indoor air quality because it tends to affect everyone equally. When the humidity is under control, the indoor air quality will also be under better control. This post will explain how controlling humidity can improve indoor air quality in general.