For cleaner, less polluted household or business air, install this 17.5" x 27" x 4" furnace filter, the SafeHome Duo 4. This air filter for furnaces is for HVAC systems with 4 or 5 inch air filter slots . Each disposable air filter has 2 layers to absorb dirt and chemical fumes. Offers up to 6 times the strength of our powerful one inch thick Duo furnace filters. Designed
to replace either 4" or 5" filters, the Duo4 traps hazardous
chemicals, odors and allergens unlike any other filter. Always check with your HVAC technician before changing from your current furnace filter. This unit is a MERV 8. Made in USA .
The Safe Home™ Duo4 looks different because it is different. Safe Home's filters are the only home air replacement filters that capture allergens, odors, and harmful
chemicals. The Duo4 features a superior design with 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 3 months.
How does the Duo4 work? This
polyester media filter with chemical filter uses 300 grams/sq. ft. of
50/50 activated carbon and potassium permanganate based FormaldaSorb™ to
trap gases, odors and chemicals including formaldehyde, benzene,
toluene, ammonia and ozone. 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: 17.5" x 27" x 4"(Note: actual physical size is slighter smaller per industry standards to fit the slot.)
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.