I started running Merv 13 filters on box fans in frequently used rooms. It cuts down on dust, pollen, and smog very well.
I started running Merv 13 filters on box fans in frequently used rooms. It cuts down on dust, pollen, and smog very well.
I started running Merv 13 filters on box fans in frequently used rooms. It cuts down on dust, pollen, and smog very well.
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