I love going to Keller Air and getting my filters. You can go to Lowes or Home Depot but you don’t get the quality of filters you need like you do at Keller Air. I buy a box of 12 and since I have 2 filters I have to change it makes it last longer than buying the dinky ones at the other supply houses. I also have a Bryant Air Conditioner for my house and it works AWESOME. Definitely would buy all my air supplies here.