Negative Positive
Title: LOUD & EXPENSIVE
Review: I bought this filter for my mom's house because she has bad allergies and has a cat. It is VERY LOUD, so she can not leave it on during the night while she sleeps. Also, the HEPA filters that you need to change out every year cost almost as much as the unit $60-$90 and you also have to buy another filter that is not as expensive $20 but you have to change out every other month. The 1-bedroom condo still smells of Tiger the cat, even though he sadly passed away several months ago.
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