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How to Buy an Air Purifier

An air filtration machine (which manufacturers often call a "purifier") may help remove irritants from the air. But not all models are that useful — or even healthy. What to consider — and avoid — when shopping.

What to Look For

CADR (clean air delivery rate) delineates the maximum square footage recommended in which to use the filter (a good baseline for choosing a room unit) and how quickly it can remove three types of pollutants: smoke (with a number ranging from 10 to 450), dust (10 to 400), and pollen (25 to 450). The higher the value, the faster — but not necessarily the more thoroughly — the machine filters the air.

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Interior paints: Not all green logos mean the same thing

Consumer Reports newest Ratings of interior paints include many subpar low- and no-VOC (volatile organic compounds) paints along with those that made our winners’ circle. You’ll also find a growing array of green logos, although some of those certifications are self-awarded. A new Asthma & Allergy Friendly certification is among the ones you’ll see when shopping for paint. Here’s a guide to six of the most common green labels.

Asthma & Allergy Friendly This one comes from the Asthma and Allergy Foundation of America. The foundation measures VOCs emitted during application and prohibits certain harmful chemicals. Companies pay $7,500 or more to have paints tested and use the logo. Among tested paints, Valspar + has it.

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