It’s sort of odd when we assume we know something and we end up being completely and utterly mistaken, but this happens every now and again to me and I’m regularly a bit stunned… It’s not that I assume that I’m some sort of genius because that’s just way off the mark, then but I truthfully thought that any adult knew that the Heating and Air Conditioning device was cleaning the air. To me, this was simply a given; How could you have indoor air pollution if you had an Heating and Air Conditioning unit? It just didn’t make any sense to me. That’s because I sort of put things together in my mind that I decided were commonly held facts. The actual facts are that residential Heating and Air Conditioning doesn’t wash the air unless it has some help. I thought that because there was dust and grime on the air filter when I changed it, the Heating and Air Conditioning unit was cleaning the air. But the air filters that I was using were merely trapping the stuff that was big enough to hurt the Heating and Air Conditioning equipment. To certainly improve the indoor air quality, I had to either get an whole-dwelling air purifier or an air filter that was designed to trap and remove airborne contaminants. This was stunning news to me and I felt like a complete idiot. But that didn’t stop me from replacing that cheap air filter with a HEPA filter… Now, the HEPA filter is removing more than 99 percent of all the bad stuff which is suspended in the air of my house. Not only am I breathing better, however I’m also strengthening my immune response.