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The NORDIC PURE 20x21x1ExactCustomM14+C-12 is a custom-cut, pleated HVAC air filter rated MERV 14 with an activated carbon layer, sized to an exact nominal 20 x 21 x 1 inches with an actual dimension of 20 x 21 x 0.75 inches. It uses electrostatically charged synthetic filter media to capture a broad range of airborne particulates, including lint, dust, pollen, pet dander, mold spores, smoke, bacteria, and viruses. The added carbon layer addresses odors and gaseous contaminants. This filter is manufactured to order in the USA and ships in a 12-pack. HVAC technicians and facilities maintenance professionals install this filter in forced-air heating and cooling systems requiring exact non-standard dimensions.
This filter is suited for residential and light commercial forced-air HVAC applications where a standard nominal size does not fit the filter housing. The exact 20 x 21 x 0.75-inch actual size is custom-fabricated, meaning it is cut down or combined from standard filter frames to match the specified opening precisely. It is appropriate for gas furnaces, heat pumps, and central air conditioning systems that require a close-tolerance fit. Filter service life varies by environment; typical replacement interval is every 30 to 90 days depending on indoor air quality conditions and system runtime.
Designed as a custom exact-size replacement filter for forced-air HVAC systems requiring a nominal 20 x 21 x 1-inch filter with an actual size of 20 x 21 x 0.75 inches. Because this is a custom-fabricated size, verify the actual opening dimensions with a tape measure before ordering. Custom sizes are non-returnable.
Installation is performed by HVAC technicians or qualified maintenance personnel. Power down or set the thermostat to the off position before removing the existing filter to prevent unfiltered air from circulating through the air handler. Confirm airflow direction arrow on the filter frame aligns with the direction of airflow toward the blower. Because this is a custom exact-size filter, measure the actual filter slot opening before ordering; standard-size filters are not interchangeable with this SKU.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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