Field Controls 46566900 Air Filter, 21-1/2 in L, 24-9/16 in W, 11 MERV

Breathe easy with Field Controls media air cleaners! Our state of the art air-filtration system provides maximum indoor air cleaning and air filtering capacity, trapping particles as small as 1 um - ideal for anyone with allergies and asthma. Media air cleaners install in the return duct of virtually any forced-air heating or cooling system gas, oil or electric. As air flows through the system, the media air cleaner traps particles as small as 1 um (1 um equals to 0.000039 in), including pollen, dust and dander. Our media air cleaners feature a high-quality, powder-coated finish metal cabinet which is durable and attractive. The HeavySeal design provides a super tight envelope with no leakage around the filter or out of the ductwork. Model FC11 air filtering cabinets are available with high-efficiency MERV 11 media filters that feature depth loading to capture larger particles on the surface and smaller particles deeper within the media.