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The PRO-SOURCE PRO21588 is a MERV 13 pleated air filter designed for residential and light commercial HVAC systems that require high-efficiency particulate capture without sacrificing airflow. The filter uses a wire-backed synthetic media construction that holds pleat geometry under load, maintaining consistent face velocity across the full filter surface. At MERV 13, it captures 80 to 85 percent of target particles, making it suitable for environments where air quality standards demand performance above standard fiberglass or lower-MERV pleated media. The beverage board frame provides structural rigidity during installation and handling. Rated for airflows up to 825 CFM at a maximum face velocity of 300 feet per minute.
This filter is appropriate for any forced-air HVAC unit that accepts a standard 20x20x1-inch filter. Typical installations include residential split systems, packaged rooftop units, air handlers, and fan coil units where a 1-inch filter slot is present. The MERV 13 rating makes it a common specification in schools, medical offices, and multifamily housing where indoor air quality standards are elevated. The manufacturer lists compatibility with any unit accepting this nominal size. LEED point eligibility may apply to qualifying projects where documentation is required.
Designed to fit any forced-air HVAC unit or air handler accepting a nominal 20x20x1-inch filter. Actual dimensions are 19.5 x 19.5 x 0.75 inches, which is standard for this nominal size class.
Installation is performed by HVAC technicians or qualified service personnel. Power down or set the thermostat to off before replacing the filter to prevent unfiltered air from bypassing the media during the swap. Verify the airflow direction arrow on the filter frame aligns with the direction of airflow toward the blower before seating the filter. Inspect the filter track and housing seal for gaps that could allow bypass, which reduces effective filtration efficiency at MERV 13 ratings.
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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