How to Use Your HVAC System to Combat Indoor Allergies.

How to Use Your HVAC System to Combat Indoor Allergies. To combat indoor allergies, make sure the HVAC system is well-maintained. Regularly change filters, preferably to HEPA or filters with higher MERV ratings, to trap allergens like dust mites, pollen, and pet dander. Proper ventilation and humidity control also help; maintain humidity between 20% and…