Overview F300 optimizes efficiency with airflow capturing up to 98% of particles that pass through it. It operates with all gas, oil and electric forced warm air furnaces and AC systems, and is available in four sizes to fit most ducts. Features Media post-filter provides enhanced filtration on select models. Solid state power supply is self-regulating and maintains peak efficiency during a wide range of cell dirt loading conditions. Low-profile door with test button to check system operation. Helps filter efficiency-robbing "gunk" before it coats critical system parts. Very low pressure drop. Exclusive 10-year Clean Coil Guarantee. Rugged zinc-coated, roll-formed cabinet provides superior strength and corrosion protection. Product Specifications ApplicationDuct mounted Dimensions (in.) 20 in. x 12 1/2in. Dimensions (mm) 508 mm x 318 mm Type of Air CleanerElectronic Air Cleaner Airflow Capacity (cfm) Maximum-- 875 cfm Airflow Capacity (m³/hr) Maximum-- 1487 m³/hr Efficiency StandardEfficiency ranges are defined for small particles, E1=0.3 to 1.0 microns; medium particles, E2=1.0 to 3.0 microns; and large particles, E3=3.0 to 10.0 microns.,Efficiency ratings are based on American Society of Heating, Refrigerating and Air-Conditioning Fractional EfficiencyE1=73%, E2=88%, E3=95% Electrical Ratings120 Vac, 0.4A max. Replacement Filters 50000293-004 Frequency60 Hz Static Pressure Drop (in. w.c.)0.15 at 500 FPM Additional FeaturesPost-filter not included. Approvals, Underwriters Laboratories Inc.Listed: Report E30954 Tradeline ValueTradeline