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Actual filter size is: 19.56 x 24.13 x 4.75 Inch.This filter is compatible with TrionAirBear furnaces calling for a 5" filter.#1 Recommended Brand* (*Filtrete Brand is the most recommended brand of HVAC Air Filters based on the US Filtrete Brand Health Tracker, Ipsos, June 2022).The higher the MPR, the more microparticles--such as pollen, pet dander, smoke, bacteria and viruses--your filter will capture from the air passing through it.FOR OPTIMAL PERFORMANCE of your heating & cooling system or HVAC system, change your home air filter at least every 12 months for 4 in. and 5 in. filters.A dirty filter will slow down air flow and make the system work harder to keep you warm or cool--wasting energy. Sign-up for a filter change reminder program that works for you!.CAPTURES MORE PARTICLES than fiberglass air filters.ATTRACTS AND CAPTURES particles such as lint, pollen, dust, pet dander, smoke and smog.54% SMALL PARTICLE CAPTURE, like bacteria and particles that carry viruses* (* % captured is based on ASHRAE 52.2 testing for 0.3 to 1 micron particles from the air passing through the filter, which relates to HVAC industry standard efficiency testing).MPR 1550 has a rating of MERV 12
