Frigidaire Pureair 20X25X1 Merv 8, Exact Dimensions 19.81 X 24.81 X 0.81 Enjoy cleaner, fresher indoor air with the PureAir HVAC MERV 8 Allergen Filter. This filter captures common allergens and other airborne particles such as pollen, household dust, dust mite debris, carpet fibers, lint and more. The filter traps up to 85% of airborne particles 3-10 micrometers in size.* A pleated design, electrostatic dual wire backing, and air flow indicator arrow provides high performance and simple installation. For best performance, replace every 3 months. 20x25x1 filter is compatible with standard residentail furnace, air conditioner, or HVAC systems. MERV 8 filter captures common allergens for fresher, cleaner air. As Tested per ASHRAE 52.2 MERV testing. This filter does not claim to remove or reduce any living allerge Captures common allergens such as pollen, dust, lint and more High-performance pleated design and dual wire backing A fresher home in minutes with simple installation Replace your air filter every 3 months for best performance