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Tired of LA's smoke and smog? Here’s how to find the right air filter for your homeThese pollutants come into our homes in different sizes ... that’s where the MERV rating comes in. MERV ratings are the industry standard. It’s the minimum efficiency reporting values that ...
The most commonly used system applies a MERV number (minimum efficiency reporting ... systems called MPR (microparticle performance rating) and FPR (filter performance rating), respectively.
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