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The PRO-SOURCE PS21145 is a MERV 8 pleated air filter designed for use in residential and light commercial HVAC systems. It measures 20 x 25 x 2 inches nominal (19.5 x 24.5 x 1.75 inches actual) and uses a synthetic pleated media housed in a rigid paperboard frame. At a rated airflow of 1,300 CFM and a maximum face velocity of 500 feet per minute, it delivers 35% particle capture efficiency while keeping initial resistance low at 0.26 inches water gauge. It is installed by HVAC technicians or knowledgeable maintenance personnel performing routine filter replacements.
This filter suits a wide range of forced-air systems including residential furnaces, air handlers, and packaged rooftop units. The pleated synthetic media provides a larger surface area compared to fiberglass panel filters, improving dust-holding capacity without significantly increasing static pressure drop. It is rated for continuous service up to 150 degrees F, making it appropriate for standard heating and cooling applications. Compatibility is stated as any unit accepting a 20 x 25 x 2 inches filter slot.
Designed for use with any forced-air HVAC unit accepting a nominal 20 x 25 x 2 inches filter, including residential furnaces, air handlers, and light commercial systems with a standard filter rack of that size.
Installation is a routine maintenance task performed by HVAC technicians or qualified building maintenance staff. Always shut down the air handler or furnace at the disconnect or thermostat before replacing the filter. Confirm the airflow direction arrow on the filter frame aligns with the direction of airflow into the system. Inspect the filter rack and surrounding cabinet panels for air bypass gaps before returning the unit to service.
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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