BOOGUAN 20x20x1 MERV11 Pleated HVAC HC Furnace Air Filter 4-Pack

?MERV 11? Improve your indoor air quality with the MERV 11 air filters by BOOGUAN! Say goodbye to dust, pet dander?pollen, dust mite, debris, lint, mold spores, smoke, smog, and auto exhaust particulates. Say hello to better indoor air quality! ?High Quality? Moisture-resistant clay coated frame, which stays strong through humidity and temperatures up to 180° F (81?). Pleated filters deliver multiple benefits – greater surface area means more air coverage, thicker for great capture capacity, and extended life for your AC or furnace. ?How to Install Your Filter? Step 1 : Remove plastic and label. Step 2 : Find the arrow and point it toward the AC/heating fan. Step 3 : Put the filter into its slot. ?Filter Change? It is recommended to change out your air filters every 60-90 days. ?Warranty and Service Policy? If you have any issues, suggestions, questions, or concerns. Please contact us, we will respond you within 24 hours and resolve the issue as soon as possible.