One Inch Return Air Filter System Removes VOC's Plus Dirt and Allergens 14 x 25 x 1 inch. Replacement for standard one inch fiberglass cold air return air filters. Dual dual air purifier system improves air quality. Safe Home (TM) air purification system has 4 replacement dust and allergen filters and 1 high density carbon filter to remove odors and gasses from home or business. Safe Home (TM) return air system filters trap odor, allergens and chemicals in the air: you don't inhale them or recirculate to those who may have impaired immune systems. SafeHome Air Return Filters let you purify home air from both allergens and hazardous chemicals. Always check with your HVAC technician before changing from your current furnace filter. Made in USA . Safe Home (TM) Air Purification System Features: Captures up to 95% of the common household allergens that can cause sneezing, sniffling and other allergic reactions with replaceable pre-filter. Eliminates or reduces odors from animals,paint, food and more via the second high density carbon filter. Formaldasorb within the carbon filter traps harmful gases such as ammonia and formaldehyde. The high density carbon filter has 125 grams per square foot of activated carbon plus FormadaSorb. Installation: Open or unscrew the air return grill to remove old air filter, Insert the carbon filter into the air filter slot on the side that receives air after the initial filter. Then install the second furnace filter in the filter slot in the return air grille. Always install so that return air flows through the pre-filter first. For the best pollution control, change the carbon air purifier filter at least once per year. Replace the white allergen filter at least every three months. More polluted environments may require more frequent changes of both filters. Available Sizes Include: 14X20X1, 14X25X1 , 16X20X1, 16X25X1, 20X20X1, 20X25X1, 24X24X1
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