Comparing these oven filters to the cost of other brands with similar characteristics they are a lot cheaper considering they can be had for $15 each and I'm tired of paying more $20 for allergen and pet dander filters that 3M has. While I don't know how well they work yet because we haven't run heat or air since we bought them, can I go 3 or more months before I have to replace them like I've always had to do with 3M filters when they were just acquired? a much greater value. We'll find out though, as we only went live today, May 31st, so I'll be sure to update this review in the future. Now my first impression about these filters when I opened the box to install the filter was that these filters are very good quality for them. They last longer than other branded filters I've used, including expensive 3M filters. I've never seen a filter that uses a cross support structure on both sides of the filters, which should make them a lot easier to remove from the oven when I need to replace them. Something else I noticed today and I'm not sure if it's because of those filters compared to 3M or because our A/C fan motor was replaced but compared to last year when we finally turned on the air, our house cooled down in about an hour, the temperature dropped from 86 to 72. It used to take 6 to 12 hours. Pros: I will add after replacing the first filter Cons: I will add after replacing the first filter
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