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The NORDIC PURE 20x25x5LXREDM10-1 is a MERV 10 rated pleated air filter designed as a direct replacement for Lennox X6673 and X6675 media filters. Nominal size is 20x25x5 with an actual size of 19.75 x 24.75 x 4.38 inches. The filter media is hypoallergenic, antimicrobial, and electrostatic, bonded to a heavy-duty moisture-resistant beverage board frame with a metal mesh support grid for structural integrity. Each pass through the media captures pollen, household dust, pet dander, bacteria, mold spores, smoke particles, allergens, and virus carriers. Licensed HVAC technicians and qualified service professionals typically handle installation in residential forced-air systems.
This filter fits furnace and air handler applications that use the Lennox X6673 or X6675 media filter housing. The 20x25x5 nominal size is a common deep-media format used in high-capacity single-filter setups on residential heating and cooling systems. Always verify the actual filter dimensions against the housing before ordering, as nominal and actual sizes vary across manufacturers. The MERV 10 rating is equivalent to MPR 1000 and outperforms standard fiberglass, washable, and poly disposable filter types for particle capture efficiency.
Designed as a direct replacement for Lennox X6673 and X6675 media air filters. Also compatible with Honeywell, Carrier, and Bryant systems using the same 20x25x5 nominal filter housing. Always measure the existing filter or housing to confirm actual dimensions match 19.75 x 24.75 x 4.38 inches before installation.
Installation should be performed by a licensed HVAC technician or qualified professional. Power down the air handler or furnace at the disconnect or breaker before servicing the filter compartment. Insert the filter with the airflow direction arrow pointing toward the blower. Nordic Pure recommends replacing this filter every 3 to 6 months under normal operating conditions, with more frequent changes during home renovation activity or periods of high dust load.
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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