Review on 🌬️ HEPA Filter Replacement for Whirlpool Whispure Air Purifier Models AP450 AP510 AP45030HO with 4 Pre-Carbon Filters - Replaces Part # 1183054 by Christopher Scales

I have been using this brand of Hepa filters and pre-filters for several years with no problems. We last ordered in November 2018. They didn't smell and the pre-filters were twice as thick. Bought again in May 2019, same brand but not the same quality. The NEW pre-filters have a terrible smell. Hepa filters are ok. Recently installed a new hepa filter with a new pre-filter in one air filter and installed another new pre-filter in the 2nd air filter. 1 week has passed with both air filters running at maximum speed. Came home to a very smelly house. The house smelled of vinegar mixed with cat urine. I turned off the air purifiers and ventilated the house. I have replaced the pre-filters with previously purchased filters from a different brand. Now the air purifiers are working properly.