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HEPA Longevity Test: Day 200

One of the biggest questions when I started doing the DIY was HEPA lifespan–how long do the HEPAs last? Rather than just give people a nice-sounding answer, I wanted to see what the data says, so Gus...

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Why Air Purifier Pre-Filters May Be More Harm than Good

Most purifiers on the market come with a pre-filter. That would make one think that pre-filters must be a good thing, right?   However, most purifier companies also love to selling people 6-stage...

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