https://www.factorydirectfilters.co...MIwsqE_Nby8gIVicDICh0bNAVTEAQYAiABEgIsX_D_BwEWhat sort of filter do you use?
It say's it's an inch thick but it's not; more like 1/8" thick sheet. I cut it to size and stapled it up. When I took it down last spring, I folded it up and put it away. I bet I can get 2-3 years out of it, at least.