Sorry it has talken so long for me to reply, to Kelly, the deodorizers I found were really cheap. Only a couple of bucks for 2 of them. And I have used the 3m filters for years. Because of our children having asthma, we change them every 2-3 weeks. And majority of furnaces don’t offer permanant filters that are washable. I know that we can’t use them and if you try to clean a filter then there is no way of knowing that you are really getting rid of the bacteria and germs. We only use the disposables. I apologize to all the landfills, but it keeps my girls healthy. I have more confidence in using new. And most people know that I don’t like to spend money so very rarely will I recommend a product with a high cost. Good luck
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