The last shipment of filters we purchased seems to be manufactured with thinner material. Filter collapsed in the middle. I can send a picture if you send me link. Thanks, Bill Moore
I purchased the Filter buy brand of filters for both the upstairs and downstairs units. We had always used the 3M filters but decided to give the Filterbuy a chance. So far, we are pleased with the new filters as they are performing every bit as well as the 3M brand. Maybe even better with outside odors.