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The NORDIC PURE 12_1/2x21x1ExactCustomM12+C-6 is a custom-cut, pleated MERV 12 Plus Carbon air filter designed for residential and light-commercial AC and furnace systems. Sold in a 6-pack, each filter is hand-made to exact dimensions of 12.5 x 21 x 0.75 inches, with activated carbon media layered into the pleated media to address both particulate capture and odor reduction. A licensed HVAC technician or knowledgeable installer fits this filter into systems where no standard nominal size matches the opening. Because the filter is built to order, confirming the actual measured size of the existing filter before ordering is essential.
This filter is intended for residential forced-air furnace and central air conditioning systems with non-standard filter openings that require a custom nominal size of 12.5 x 21 x 1 inch. Nordic Pure constructs these custom sizes by cutting down or combining standard filter frames, sometimes using tape reinforcement, depending on the final dimensions. The reinforced 2-part frame supports consistent airflow and structural integrity over the filter life. Replacement interval for 1-inch filters is typically every 30 to 90 days, depending on household conditions such as pets, dust levels, and occupancy.
Designed for forced-air furnace and central AC systems requiring a custom nominal filter size of 12.5 x 21 x 1 inch. Measure the actual filter slot dimensions before ordering, as this is a non-returnable custom-made product. The actual filter size is 12.5 x 21 x 0.75 inches.
Installation is performed by HVAC technicians or qualified service personnel. Always shut off the furnace or air handler at the disconnect or thermostat before removing or replacing the filter. Confirm airflow direction markings on the filter frame align with the system airflow arrow in the filter cabinet. Because this is a custom-made filter built to the dimensions entered at time of order, verify actual slot measurements with a tape measure to the nearest 1/8 inch before ordering to avoid fitment issues.
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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