Summary
Heating, ventilation, and air conditioning (HVAC) systems don’t directly cause allergies, but they often circulate indoor irritants that trigger symptoms, the article explains. When systems run, they can spread dust, pollen, pet dander, mold spores, and bacteria trapped in filters or ducts. Poor maintenance, clogged filters, and moisture buildup can worsen air quality and intensify sneezing, coughing, and congestion. The article stresses regular filter changes, cleaning vents and coils, and controlling humidity to reduce allergens. It also highlights that leaks or dirty components inside the system can continuously recirculate contaminants, making allergy symptoms feel persistent indoors even when the outdoor air is clear.
Family Handyman
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