AIRx Filters 20x36x1 Allergy (19.50 x 35.50 x 0.75 in) air filters uses MERV 11 materials to filter out micron-size contaminant such as Lint, Dust, Pollen, Dust Mite Debris, Mold Spores, Pet Dander, Smoke, and Smog to meet ASHRAE 52.2 standard. Using a MERV 11 rated HVAC filter media reduces potential allergens, pets odors, smoke, etc. that can greatly affect the quality of your indoor air. Besides cleaner air, AIRx Filters 20x36x1 replacement air filters use more pleats per square inch in order to provide better airflow than other similar air filters, leading to optimal HVAC heating and cooling system performance and reduced energy and maintenance costs. The 20x36x1 AIRx Filters Allergy replacement air filter is built to fit popular residential HVAC furnace systems including: Carrier, Bryant, American Standard, Trane, Amana, HEIL, Daikin, York, Lennox, Goodman, Rheem, Ruud, LG, and others. Every AIRx Filters HVAC air filter replacement is proudly made in the USA with high-quality materials, ensuring a great air filter every time. Compare these air filters with Allergen Defense MPR 1000 1085 1200, Odor Reduction MPR 1200models. Buy with confidence and expect these replacement air filters to last 90 days in most homes or for increased energy efficiency, replace filters every 2 months. DISCLAIMER: DiscountFilters and AirX Filters are not affiliated with the brands in this listing. This is not an OEM product and is not covered under any brand/manufacturer's warranty. Any use/mention of the brand name or model designation for this listing is made solely for purposes of demonstrating compatibility.