I have been using these filters and replacing them every 6 months for over a decade. However, the last two filters I installed gave off a strong, unpleasant chemical odor that led me to believe something was wrong with my air conditioner. After seeing other reviews of the fragrance, I'm wondering what has changed since this product was made. I've replaced them a number of times to get rid of the smell but they've been consistently bad for the last few cycles. Perhaps the cheaper version is just as valuable now as it smells cheap and doesn't serve the purpose of an air purifier.
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