I ordered 10 filters also 10/2018 @ 10 filters in 10/2020. I love the filters a lot as after I started using them my Asthma was much better. I have told several people about these great filters and I wont buy any other filter than from here. Believe me once you use one filter you will be sold to continue using these filters. I am from Florida and my Air Conditioner is on most of the year. Love these filters:love_letter::love_letter::love_letter: