21.5x23.25x1 Furnace Filters

Breathe cleaner air with our premium 21.5x23.25x1 furnace filters. Available in MERV 8, 11, and 13 ratings to capture dust, allergens, and airborne particles. Our high-quality pleated designs offer superior filtration while maintaining proper airflow. Protect your HVAC system and improve indoor air quality with these American-made filters.