I was looking to buy a cheap HEPA air filter to see if it worked in my furnace.
I knew they were expensive and I didn’t want to buy an expensive before I knew if it was going to work in my furnace.
I went to several different HVAC companies in my search for a cheap HEPA air filter, but everyone looked at me oddly. I finally had one HVAC technician give me one he kept in his service van, just to show homeowners how much thicker they were than regular air filters. He asked for my address and told me he would come to the house and let me see if it worked. Later that afternoon, I was just getting home from work when the HVAC technician arrived. I showed him to the basement, and he brought the HEPA air filter with him. He showed me the difference between my air filter and the HEPA air filter. He explained the reason the HEPA air filter was so much heavier was because it was made to attract more dirt and debris, and hold it. The furnace had to have special requirements if it was going to house a HEPA air filter. He said that most furnaces made more than ten years ago, would not be able to have a HEPA air filter installed without doing harm to the furnace. It wouldn’t allow enough airflow, and it would actually damage the component and cause more harm than good. I hated to admit he may be right, but I had to admit that what he was saying about the HEPA air filter made a lot of sense now that I saw the difference.