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The NORDIC PURE 20x21_1/2x1ExactCustomM7+C-6 is a custom-cut, MERV 7 plus carbon pleated air filter designed for residential AC and furnace systems. It ships as a 6-pack with a nominal size of 20 x 21.5 x 1 inches and an actual size of 20 x 21.5 x 0.75 inches. The carbon layer targets common household odors while the MERV 7 media captures airborne particles in the 3-10 micron range, including dust, pollen, pet dander, lint, and mold spores. These filters are hand-built to the exact dimensions entered at the time of order, making them suited for non-standard filter openings where stock sizes do not fit. HVAC technicians and knowledgeable homeowners install this filter in forced-air systems where a precise fit is required.
This filter is intended for residential forced-air furnace and central air conditioning systems with non-standard filter openings. Because it is manufactured to exact submitted measurements, it fits applications where nominal off-the-shelf sizes fall short by more than 1/8 inch in any dimension. The reinforced 2-part frame supports consistent airflow and structural integrity across the full service life of the filter. A recommended replacement interval of 30-90 days applies under typical residential conditions. The 6-pack quantity supports a full seasonal rotation or stocking for multiple units.
Designed as a custom OEM-style replacement filter for residential forced-air furnace and central air conditioning systems requiring a nominal 20 x 21.5 x 1 inch filter with exact-cut dimensions. Verify the actual opening measurement to the nearest 1/8 inch before ordering, as this product is non-returnable.
Filter replacement is typically performed by a licensed HVAC technician or a qualified homeowner. Always set the thermostat to off and shut down the air handler before removing the existing filter. Confirm airflow direction marked on the filter frame matches the direction of airflow in the system before seating the new filter. Because this is a custom-cut size, measure the existing filter or the filter slot opening carefully before placing an order, as custom filters cannot be returned.
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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