What does not like! The filter corresponds to the price, which must correspond to the quality. They have more surface area (more folds) than I've ever seen in the 16x25 size I'm using. This means they last longer and reduce airflow more slowly as they collect dirt. They are metal reinforced and the cardboard body is criss-crossed to prevent them from warping or collapsing - some things I've seen have been omitted from the branded filters I've used before.
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