12" x 20" AC Filter MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 11.75 X 19.75] 3-Pack

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12" x 20" AC Filter Merv 8 Filter for HVAC Return Filter Grille - 3 Pack Actual Dimensions: 11.75" X 19.75" Our home air vent filters have a unique combination of cotton & synthetic fibers that give you the most filtration and the least air resistance The "W" Shaped Pleats Give You More Filter Surface Thereby Capturing More Dust All Our Filter Are Tested Per ASHRAE-52.2 Standards - MERV 8 - And An Average Arrestance Of 90-94% Extra Strong Frame Material - We use extra thick board that prevents humidity, and the full outer portion is double layered for clean airflow Our Metal And Paper Diagonal Support Bars Ensure The Filter Can Hold An Extra Heavy Load of Dirt. We Use Special Materials To Prevent Corrosion What Is A MERV Rating? Minimum Efficiency Reporting Value (MERV) is a standard that rates the overall effectiveness of air filters. Higher value MERV rating equates to finer filtration, meaning fewer dust debris and other debris can pass through the filter. MERV 8 - The Perfect Balance. MERV 8 is the most recommended level of filtration by industry professionals. If you still have the fiberglass low quality filter that is below MERV 4, you should change NOW! You are missing out on healthier breathing and life. Why HVAC Premium? Our MERV 8 pleated filter is 30 times more efficient at capturing small debris than ordinary fiberglass filters. Designed to last up to three months depending. *** 100% Satisfaction Guarantee. *** What does this mean? If for any reason you are not 100% satisfied with the filters-we will refund your money. Guaranteed.