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The KOCH FILTER P422025 is a MERV 8 pleated air filter built for residential and light commercial HVAC systems. It measures 20 inches by 25 inches by 2 inches and uses synthetic fiber media backed by an expanded metal support grid. The pleated construction increases media surface area, which raises dust-holding capacity and extends service intervals compared to flat-panel filters. A moisture-resistant frame holds its shape across seasonal humidity swings. Licensed HVAC technicians and qualified service pros install this filter as a scheduled maintenance item to protect equipment and maintain airflow balance.
This filter is suited for residential forced-air systems and light commercial air handlers where a MERV 8 efficiency level is specified. MERV 8 captures a broad range of common airborne particles including dust, pollen, mold spores, and pet dander while keeping static pressure drop low enough to avoid restricting system airflow. It is an appropriate choice for standard split systems, package units, and air handlers that accept a 20 by 25 by 2 inch filter slot without modification.
Designed as a direct-fit replacement for residential and light commercial HVAC systems requiring a 20 by 25 by 2 inch pleated filter with MERV 8 efficiency rating.
A licensed HVAC technician or qualified maintenance professional should perform filter replacement. Always shut the air handler or furnace down at the system disconnect before opening the filter compartment. Confirm airflow direction arrows on the filter frame align with the direction of airflow toward the blower before seating the filter. Replace on a scheduled interval appropriate for the site dust load, typically every 60 to 90 days in residential applications.
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