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Replacement Humidifier Filter

BestAir Replacement Humidifier Filter

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Is this a paper or metal filter? I have an Aprilaire 550 & the old filter I’m replacing appears to be approx 9 x 9 x 1.5. Will this product fit?


Thanks for writing. The A10 is a Metal/Clay water pad and it does fit the Aprilaire 550. We have a paper version of that water pad, the A10W, that many people prefer. It also fits the AA 550. You can view that by clicking on this link. https://www.lowes.com/pd/BestAir-Replacement-Humidifier-Filter/1000721548

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