Tier1 20x20x4 Merv 11 Ultra Allergen Air Filter 6 Pack (Actual Size: 19-1/2" x 19-1/2" x 3-5/8")

Filter Specifications: 20" x 20" x 4" Made in the USA MERV 11 replacement air filter (comparable with MPR 1000 -1200 & FPR 7); Actual Size: 19-1/2" x 19-1/2" x 3-5/8"

Standard Compatibility: This air filter works with HVAC systems that take 4" filters. Measure your air filter and compare it to our "Actual Size" to ensure proper fit. It is comparable to the 3M Filtrete MPR 1000 Allergen Defense, Honeywell FPR 7 Allergen Plus, Aerostar MERV 11 Allergy, and Filterbuy MERV 11 Gold series of filters.

Effective Filtration: Low pressure drop electrostatically charged MERV 11 filter media traps unwanted microscopic air particles such as lint, dust mites, spores, pollen, pet dander, fine dust, and auto emissions.

High-Quality Construction: Features 100% synthetic thermally bonded fibers with no chemical binders continuously bonded to a galvanized metal support grid and supported by a high wet strength moisture resistant beverage board frame

Easy to Replace: Installing or replacing Tier1 air filters is quick and easy. Simply remove your old filter from the return to your furnace, and slide in the new filter. It's recommended to change your filters every 90 days to maintain optimal filtration.