I never actually used HEPA air filters before either, I always figured they were too expensive.
I was incredibly disappointed when I couldn’t find any air filters at the hardware store. They are usually stocked to the brim but evidently people rushed to get air filters at the same time. There were actually a few air filters left, but a size that my HVAC system would not take. I briefly considered the possibility of cutting one to size and somehow rigging it to fit in my HVAC system, but then I thought that was probably not a good idea. I ended up going to a few other places and still couldn’t find the size of air filter I needed. Then when I went to the corner store to pick up some cigarettes, I was shocked when I saw a sign that said HEPA air filters were on sale. I went to look at the HEPA air filters and they were the right size for my HVAC system! I ended up buying a bunch of them and I was really happy when I was able to change my old nasty air filter. I never actually used HEPA air filters before either, I always figured they were too expensive. They were surprisingly still expensive while they were on sale and I figured that’s why most people didn’t buy them. I was just desperate to have my air filter changed though so the price didn’t bother me too much. I was telling that guy at the gas station that I went all over looking for air filters and the last place I expected to find air filters was at the corner store. He smiled and said he was happy to be able to help me out.
Heat pump