When I bought this Hepa air filter and changed the filter shortly after, it was a different type of filter. Looked fatter and seemed more built. I'm referring to the ribbing of the filter and the way it was designed. I think 3M changed that over time, but it still works fine. I would buy it again but I'm not sure if it really works. I now use it as a secondary filter as I bought a new heat pump that also does air filtration.
Filter under the sink Aquaphor Favorit ECO silver
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