I was easily taken for a loop when I bought some generic air filters recently plus after only 1 month the air filters needed to be changed! I could not believe my eyeah on what I was seeing! The air filter was completely used up plus I needed to put in a modern 1, and in my entire life I had never seen air filters that were this cheap before. I assume this is what I get for buying generic air filters plus trying to save a few bucks. I’m gonna use these horrible things up plus then go back to the store in a few months plus go back to buying the extravagant however quality HEPA air filters! At least with HEPA air filters I could go a few months or more occasionally without needing to change them; Also with HEPA air filters they seemed to keep the indoor air conditions a lot cleaner as well; With a lot of things, generic can be just as good as the name brand! But when it comes to air filters for your central heating plus a/c idea I am seeing that this is not the case what so ever; Generic air filters are worth nothing more than your local garbage can! This is my finding plus I am wanting to communicate this with everyone out there who is learning this. Save yourself a lot of headaches plus don’t be cheap when it comes to your air filters. Because in the long run, you are going to be spending the exact same amount anyway!