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The KOCH FILTER P421620 is a MERV 8 pleated air filter built for residential and light commercial HVAC systems. Sized at 16 inches by 20 inches by 2 inches, it uses synthetic fiber media backed by an expanded metal support grid to capture dust, pollen, mold spores, and similar airborne particles. The pleated media design increases surface area compared to flat-panel filters, which extends service life and raises dust-holding capacity. A moisture-resistant frame holds shape during normal HVAC operation. Licensed HVAC technicians and property maintenance staff install this filter during routine preventive maintenance intervals.
The P421620 is suited for forced-air heating and cooling systems in residential homes and light commercial buildings. It fits standard filter slots rated for a 16-inch by 20-inch by 2-inch nominal size. The MERV 8 rating makes it appropriate for environments where basic particulate control is required without imposing excessive static pressure on the air handler or blower. Typical applications include gas furnaces, heat pumps, and central air conditioning air handlers using standard return-air filter grilles or side-load filter cabinets.
Designed as an OEM-style replacement pleated air filter for residential and light commercial forced-air HVAC systems accepting a nominal 16-inch by 20-inch by 2-inch filter.
Installation is performed by HVAC technicians or qualified maintenance personnel. Power down or set the thermostat to OFF before replacing the filter to prevent unfiltered air from bypassing the media during changeout. Confirm airflow direction arrows on the filter frame align with system airflow before seating the filter. Follow local codes and equipment manufacturer guidelines for recommended filter replacement intervals, typically every 60 to 90 days depending on operating conditions.
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