You know, I constantly knew there were odd kinds of heating plus air conditioner filters, but I never thought they made much of a difference. I figured that it was just odd brand names that served the same purpose equally. However, I found that some brands entirely are better. I used to get the cheapest quality air conditioning filters I could find, however that was truly harmful for my air conditioner system, as well as it didn’t do a great task of cleaning the indoor air quality of my home. It wasn’t until I got a free HEPA air filter that I realized the difference. After trying a HEPA air filter in my heating plus air conditioner machine, I felt like my air was cleaner, plus I also noticed my air conditioner unit seemed to be laboring slightly more efficiently as well. I was shocked, all this from just a easy air filter change? It made me wonder what else I could change for maximum efficiency of my heating plus air conditioner system. After that experience, I decided that I was going to start buying HEPA air filters all the time. I don’t suppose I could ever see myself going back to the cheap crappy air filters that I was used to previously. If you have a central Heating, Ventilation as well as A/C unit, plus you don’t have HEPA air filters, I would highly request them. They truly do labor so much better! I am going to learn more about heating plus cooling later, to see what else I can learn.