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Home  | Indoor (178)  | Air Quality Improvement (43)  | Safe Home® Air Purification Furnace Filters (31)

Safe Home Duo Air Purify Furnace Filter 20x20x4 In.

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$58.90 (46%)
6.0 Pounds
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Ships Within 10 Business Days (2/26/2020)
HVAC Furnace Filter is 4 x 20 x 20 Inches for Dirt, Odors and Chemical Removal

For modern HVAC furnace systems , the Safe Home Duo 4 inch furnace filter MERV 8 is your best choice for clean, less polluted air. Safe Home's most powerfu l air filter for dirt, chemical fumes and other odors. Note: Check with your HVAC technician to verify that your system is able enough to handle the density of a MERV 8 filter before purchasing this or any other MERV 8 filter. Install this MERV 8 with Air Flow First Going through the White Media. Made in USA.

HVAC filter has up to 6 times the capacity of the one inch Duo furnace filter. Replaces 4" or 5" filters. SafeHome Duo4 traps hazardous chemicals , odors and allergens. Air purifier filter is 20 by 20 by 4 inches thick. Easily slides into an HVAC 4 or 5 inch filter slot.

Note: All furnace filters are made slightly smaller than the noted dimensions in order to fit into the furnace filter slots. This is an industry standard.

The Safe Home™ Duo4 looks different: the superior design has self sealing edges for maximum effectiveness at capturing allergens, odors, and chemicals from the air in your house. Use for furnace filter slots, temporary needs, or custom sizes in air return grills. The Duo4 replaces any 4" thick home air filter in any location and can last up to 9 months.

How does the Duo4 work? - The polyester outer layers remove pollen, mold spores, and other common allergens. The inner layer features FormaldaSorb™ and activated carbon that traps a variety of odors and hazardous gasses, such as formaldehyde, ammonia, and others that are emitted by cleaning chemicals, paint, particle board, and other household items. No other filters are as effective at removing dust mites, mold spores, pollen, odors, cleaning chemicals, ozone, paint fumes, and common gasses like formaldehyde which triggers asthma and allergies.

Safe Home Duo4 Filter Features:
  • Dimensions: 20" x 20" x 4"
  • Captures up to 95% of common household allergens
  • Eliminates odors from pets, paint, cooking, and more
  • Uses high density carbon and advanced compounds
  • FormaldaSorb™, a patented potassium permanganate product plus the activated carbon in the second layer of the filter trap gasses that can cause health issues.
  • Highly effective and affordable.
  • Twin filter pad: MERV 8 polyester white ASHRAE rated allergen filter plus an industrial chemical and odor filter, i.e. the activated carbon filter pad. Install so that the air flow first goes through the allergen filter side and exits through the darker, chemical and odor filtration media. 
  • Made in USA.
Note: This furnace filter is not a control device for radon, carbon monoxide or carbon dioxide.

Limited Warranty: Free of manufacturing and material defects. If product is found defective within 30 days of purchase, it will be replaced at no additional charge. Product is not packaged for sale outside of the United States. Please measure carefully or choose a filter size identical to the one in your furnace. Units that are removed from wrappings or bent from being pushed into filter slots are not returnable.

Product is not packaged for sale outside of the United States

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