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20 x 20 x 1 Washable MERV 8 8 MPR Furnace AC Filter Electrostatic Air Filter

WEB 20 x 20 x 1 Washable MERV 8 8 MPR Furnace AC Filter Electrostatic Air Filter

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are both sides of the filter the same Does it matter what side is up or down


Hi, SAS! When you receive this filter, there will be an arrow on the frame to show you which way the air should flow. For this one, the green front you see here faces "OUT" and the other side faces "IN" (or toward the duct). If you have more questions, please give us a call at 888-808-9100. Thanks! ~ Meghan, WEB Products

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