Interest in cleaning indoor air has become a major concern ofhomeowners in today?s society. Allergy sufferers are among those especially affected.The Purolator 2000/1200TM is designed exclusively for home use where particles in the 5 micron range and larger are present and can be removed efficiently and safely.With proper and continuous use the Purolator 2000/1200TM willcapture pollen dust tobacco smoke residue grease and pet dander which usually collects on furniture windows and carpets from the household environment. You will quickly notice a difference in the air quality of your home?fresher indoor air less dust pollen and spores. The Purolator 2000/1200TM serves as an effective replacement filter in home heating/air cooling system cleaners such as those manufactured by Research Products Corporation?s? Space-Gard and Trion?s?Air Bear. Insist on the Purolator 2000/1200TM for high efficiency quality construction materials workmanship and performance. Filter is fully contained in its own frame Installation is easy and fast - hands never touch the dirty media Designed for use in media air cleaners such as Air Bear? and Space-Gard? Captures pollen dust tobacco smoke residue grease pet dander etc. For systems up to 2000 CFM; average arrestance of 90% to 93% dust retention 95% open face area with moisture resistant frame Size 20" x 25" x 5" actual size 19-5/8" x 24-1/4" x 4-3/4"