The primary rule for replacing a standard 1-inch HVAC filter is to change it every 30 to 90 days. However, the exact timeline acts more like a sliding scale rather than a strict rule, heavily dependent on your filter thickness, household environment, and seasonal usage. Overlooking filter maintenance forces your HVAC system to work much harder, driving up utility bills and accelerating system wear. ⏱️ The Replacement Schedule by Filter Type
Leave a Reply