Review on 🌬️ Whirlpool 8171434K Air Purifier Active Carbon Pre-Filters - 4-Pack (Large) - Fit AP51030K, AP45030K, APR45130L, WP500 - 18x16.5 inch by Tim Pulse

Supplier (PurifiedCloud) supplied genuine Whirlpool pre filters but I agree with the other reviewer that Whirlpool seems to be making them all thinner. If I find old patterns, I will definitely compare them. It seems that even larger dust can now enter the HEPA filter. However, they are essential and I don't expect compatible 3rd party pre-filters to be any better. It makes me a little silly to overpay for a highly rated hot tub device. UPDATE: Another batch and even thinner. Another reviewer confirmed what I suspected: Whirlpool no longer makes them and has just licensed their "brand" to some unknown manufacturers in China who will continue to lower the cost of the product until all the "value" and reputation of the name is gone is. jacuzzi. Exhausted. It's the same with all previously respected American brands - Honeywell has been down this road for a long time and their products are now garbage. The bottom line is that these companies can now be marginalized because we have no reason to favor their fictional "brand" over generics made in the same factories by the same foreign workers at a higher price - it's a fool's game for us. and we only play for so long. Updated with a photo comparing the previously scaled down product to the new, even smaller product. It has been proven that this goes on until the brand loses its "value”.