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The NORDIC PURE 19_3/4x21x1ExactCustomM12-6 is a custom-cut, MERV 12 rated pleated air filter designed for residential and light commercial HVAC systems. With an actual size of 19.75 x 21 x 0.75 inches, this filter captures over 90% of airborne particles between 3 and 10 microns, and 80% to 90% of particles between 1 and 3 microns. Captured contaminants include lint, dust, pollen, pet dander, mold spores, smoke particles, bacteria, and virus carriers. The filter media is electrostatically charged to attract airborne particles and is manufactured using a moisture-resistant beverage board frame. Sold in a 6-pack, this is a made-to-order custom size intended to fit openings where standard nominal sizes do not apply. Licensed HVAC technicians and experienced service pros are the primary installers.
This filter is suited for forced-air residential furnaces, central air conditioning systems, and light commercial air handlers where a precise fit is required. The custom dimensions make it appropriate for units with non-standard filter slots that cannot accept off-the-shelf nominal-size filters. MERV 12 efficiency is comparable to filters rated MPR 1500 to 1900 on manufacturer-proprietary scales. Nordic Pure recommends replacing this filter every 1 to 3 months under normal operating conditions. Households with pets or occupants with allergies may require more frequent replacement intervals to maintain indoor air quality and system efficiency.
Custom-made to the exact nominal size of 19_3/4 x 21 x 1 with an actual size of 19.75 x 21 x 0.75 inches. Designed for forced-air HVAC systems, furnaces, and central air conditioning units requiring this specific non-standard filter dimension. Measure the existing filter slot before ordering, as this is a made-to-order item and the actual thickness is 0.75 inches, not a full 1 inch.
Power down or set the thermostat to the off position before removing the existing filter to prevent unfiltered air from circulating during the swap. Confirm airflow direction arrows on the filter frame align with the direction of airflow in the system before seating the filter. This is a custom-cut product and may incorporate taped joints depending on the dimensional combination used in production; this does not affect filtration performance. Custom sizes are non-returnable, so verify exact filter slot measurements with a tape measure prior to ordering.
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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