Airwash Whisper 7500 HEPA Air Filtration System for HVAC or Air Handler Systems Amaircare central air filtration system has dual filters for cleaning more air more efficiently for larger homes or businesses. AirWash by-pass design allows a portion of the return air duct air to be diverted, cleaned and re-entered into HVAC circulation. Quiet. Reduces air pollution within a home or building without risking air handling system function. An installation kit is available not included . The maximum recommended area size for this unit is 7500 square feet based upon 8 feet ceilings. Dual Perfect Seal 3 Stage Filtration – two sets of filters capture large particulate and VOCs with the first stage foam prefilter, harmful and irritating particulate are trapped with the second stage HEPA filter that locks in place and chemical/gas pollution are adsorbed by the third stage carbon VOC filter. Air Filtration Using a Total of 6 Filters Stage 1 Two 1/8 inch foam prefilters Stage 2 Two 100 square feet pleated Easy Twist HEPA cartridges Stage 3 Two 1/2” non-woven polyester filter media imbued 200% with Activated Carbon 164 g = 180,400 m2 adsorption surface area Optional Stage 4 Two VOC filters available. These each contain granulated carbon pellets encased in a steel mesh canister 1550 g = 1,705,000 m2 adsorption surface area Prefilter life is about 12 months. Easy Twist HEPA Filter life is 3 to 5 years and the inner carbon filter lasts about 6 months. Each filter configuration is a cylindrical perfect seal 3 stage cartridge that is 13 inches in diameter and 16 inches in height. Additional information Airflow 1320 CFM 0.5? W.C. 2240m^3/hr 12.7mm W.C. Power Consumption 400 W Insulated Cabinet Dimensions 17” W x 28” L x 32” H with weight of 82 lbs. Control Variable Speed Switch Construction 18 gauge steel housing, durable baked thermoset powder finish in Meteorite color. Intake 14” D, Outflow 2 or 4 8” D knockouts on both left and right sides. Two Motores with This item ships from a separate warehouse and may require extra time for delivery.