Introducing 3pk Replacement 20x25x5 MERV-8 HVAC Furnace Filters, the perfect fit for Honeywell F100, F200 and SpaceGard systems. Our filters are designed to provide superior air filtration without sacrificing airflow or efficiency. They are compatible with Part FC100A1037 and help reduce dust, dirt, pollen and other airborne particles from entering your home’s heating and cooling system. Perfect for those seeking an easy way to improve indoor air quality while saving energy costs!