I work with a local heating and air conditioner supplier in our area; I have been for the last 3 years and I appreciate it! Recently they had a bit of a dilemma they had to make a choice on… They sell air filters for central heating and air conditioners of course, and they wanted to slimit down to only sell a single brand of air filters for central heat and air conditioner units. The upper management said it was going to be better for the company and will receive the financial support of whichever brand name supplier of air filters both of us opted to go with! So the entire supplier took a vote based on experience. Even us heat and air conditioner workers were included and required to vote. It was entirely unlike anything I had ever seen or experienced before. In the end, it turned out that the vote went for HEPA brand air filters, and both kinds. The washable air filters by HEPA and the proper air filters by HEPA… All other brands of heating and air conditioning air filters were phased out and would no longer be sold here once they were sold out. I don’t exactly get the concept of all this personally, but if it is going to bring outside funding to help keep our heat and air conditioner supplier going no matter what, I can completely understand and propose for an exclusive brand of heating and air conditioning air filters. I am cheerful. HEPA was the winner. Because HEPA seems to be the best and leading brand in air filters on the market this week!