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Change them monthly at the best, quarterly at the worst. 2 – Washable ‘electrostatic’ filters. These have a static charge that attracts dust and other matter. Slightly more effective than ...
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Top-Rated Furnace Filters for Allergies, Dust, Pet Owners and MoreThe MERV 8 Trophy Air Washable Filter ... and it outperforms comparable non-electrostatic filters.
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