If we were looking to buy a new filter today for our HVAC (heating, ventilation, and air conditioning) system, we’d aim for a medium-efficiency filter with a MERV rating in the 8 to 13 range, which can clean the air throughout your home almost as effectively as a portable air purifier can clean a room.
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from Wirecutter: Reviews for the Real World https://www.nytimes.com/wirecutter/reviews/furnace-and-air-conditioner-filters-we-would-buy/?utm_source=rss&utm_medium=feed&utm_campaign=RSS%20Feed
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