Is smoke in your home? Here's how to make an air purifier from a box fan
NPRIs smoke in your home? Here's a quick guide to getting cleaner air: Search filters by their MERV rating Filters are key, whether you're using them to upgrade your home's HVAC system or put them in an air purifier or a DIY air cleaner. "Upgrading to a filter rated MERV 13 or higher can be especially important during smoky periods to effectively remove fine particle pollution from smoke in the indoor air," the EPA says. toggle caption Air Now/ Screenshot by NPR Build an air cleaner at home All you need is a box fan, good air filters and some duct tape, and you're in business. Sponsor Message NPR has previously posted a design and guide to building an air purifying cube known as a Corsi-Rosenthal Box, using four 20-inch MERV 13 filters, a 20-inch box fan and two 20-inch panels of cardboard.
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