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The NORDIC PURE 20x25x4M13+C-6 is a pleated MERV 13 air filter with an integrated activated carbon layer, sold in a 6-pack. The filter media is electrostatically charged synthetic material designed to capture airborne particulates down to 0.30 microns. An added flat-panel activated carbon layer adsorbs odorous gases, vapors, and volatile organic compounds (VOCs) while maintaining adequate airflow. The nominal size is 20x25x4; the actual size is 19.5 x 24.5 x 3.63 inches. A heavy-duty, moisture-resistant beverage board frame and a bonded metal mesh support grid give the filter structural integrity through its service life. This filter is installed by HVAC technicians and knowledgeable homeowners performing routine filter maintenance.
This filter fits residential and light-commercial forced-air HVAC systems that accept a 20x25x4 nominal filter slot. It is rated MERV 13, which is comparable to MPR 2200-2400. At that rating it captures more than 90% of 1.0-10.0 micron contaminants and up to 75% of 0.30-1.0 micron contaminants, making it suitable for households with allergy concerns, pets, or smoke exposure. The activated carbon component addresses odor control beyond what a standard pleated filter provides. Nordic Pure recommends replacing the filter every 3 to 6 months depending on indoor and outdoor air quality conditions. Note: if replacing a Honeywell or Lennox unit that uses a 20x25x4 filter with an actual depth of 4.375 inches, the correct replacement is the 20x25x5 series, not this filter.
Designed as an OEM-style replacement for residential and light-commercial forced-air systems accepting a nominal 20x25x4 filter. This filter has an actual depth of 3.63 inches. It is not a direct replacement for systems requiring an actual depth of 4.375 inches such as certain Honeywell and Lennox units; those applications require the 20x25x5 series.
Installation is performed by licensed HVAC technicians or qualified service personnel. Always shut down the air handler or furnace at the disconnect or thermostat before removing the existing filter to prevent unfiltered air from entering the system. Confirm the actual slot dimensions against the actual filter size (19.5 x 24.5 x 3.63 inches) before installing. Dispose of the used filter in a sealed bag to contain trapped particulates, and log the installation date to track the recommended 3 to 6 month replacement interval.
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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