I am definitely frustrated right now, You see, every year for as long as I can remember, I have been using high quality air filters for my a/c system, and I use high quality a/c filters, not only for the health of my heating and cooling unit, but for my own health as well, and everyone knows the best Heating and Air Conditioning filters are the HEPA filters, because of this HEPA filters are fairly popular, however that never proved to be a problem until now, what happened was a few weeks ago, the local Heating and Air Conditioning corporations had a large discount on a lot of their items, HEPA filters being one of the main items. I thought about buying some, however I thought I still had a good amount of the filters left, but unfortunately, I was wrong, and when I went to change out my cooling system’s filter, I realized I was completely out! I went to 5 local Heating and Air Conditioning stores to see if they had any HEPA filters in stock, and all of them were completely sold out, it was crazy. The worst part was not only were they out of those filters, but they were also out of all of the good filters, second best to the HEPA filters. All they had left was the cheap a/c filters; Knowing that my Heating and Air Conditioning machine couldn’t go without a filter, I had to buy one of the crappy cheap ones that isn’t doing anything for my Heating and Air Conditioning component. I would have thought they would have been back in stock by now, but it’s been a few weeks and they are still not back in stock, so I am stuck with the cheap filters.