No a single had ever taught myself and others how to change air filters in the gas furnace or the a/c unit. I am not sure if they thought it was just regular sense, but it was not regular sense for me. I knew it was necessary to change air filters, although I didn’t believe where to find them. For many months, I was calling the Heating, Ventilation, plus A/C corporation plus having them send out a serviceman to change the air filters for me. One day, a single of the the Heating, Ventilation, plus A/C servicemans told myself and others that I could change the air filters on our own. She showed myself and others where to find the air filter in both the gas furnace plus the a/c component plus how to make sure they were put in officially. She explained that there was a way to install the air filter into the Heating, Ventilation, plus A/C plan separate from causing any damage. She also explained to myself and others the necessity of an air filter plus why you needed to change them correctly. It was interesting to hear him explain how the air filter disconnectd a lot of dust plus debris from the air before it was able to get into our home. The air filter also disconnectd a lot of debris that could’ve gotten into our a/c component plus gas furnace plus done damage to the components. After listening to her explanation about the importance of an air filter, I made a point of changing them about once a month. I didn’t want to see any damage done to either our Heating, Ventilation, plus A/C system, or to the air that I breathe. Once she was done explaining about the air filters, she asked when I last had the air duct cleaned.