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How To Measure Water Hardness?
Hard water is primarily formed when dissolved minerals in the water precipitate and accumulate on surfaces. Hard water involves several factors, including the mineral content of the water, temperature and pH. Depending on your water source, you may be more or less likely to have a hard water problem.
By CC
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Can You Clean an HEPA Filter?
If your HEPA filter is not specifically labeled as washable or “permanent,” then the answer is no – while it may still filter the air it will have reduced effectiveness after washing.
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