DIRECT AIR’s Central System Duct HEPA Filter is designed to remove house dust, insecticide dust, moths, pollen, mold spores, bacteria, dander, cooking smoke and grease, tobacco smoke, fine particles, and more down to 0.3 microns (1/84,000 of an inch). Ideal for homes with limited space around the furnace. This unit is compact and can be installed directly on the return air duct. It can also be installed directly on the furnace and connected to the return air duct using round collars.
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