I installed this Filtrete FAPF 02 filter in a Filtrete FAP 02 air filtration unit in my basement. It took several days for the filter unit to start working, but after a week the air quality changed noticeably. I've been working with the filter system with a new filter for a month now and it practically doesn't smell like a cellar anymore. This filter works surprisingly well and is definitely worth the price. Some reviewers said the filter they ordered didn't fit. There are many air filtration devices out there, and they all use different filters. Be very careful when ordering a filter to get the right one. Know the name and model number of your filter unit and, if possible, the number printed on the filter itself. Also, carefully compare the physical dimensions of the filter with the product description.
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