It is funny that they say that people change after high college, however people go off to college and they change. There is something about people going out on their own that they really find out what they love and who they are. I have run into truly few people since I graduated high college; One person I ran into in certain was an old friend. She was now an Heating, Ventilation plus A/C specialist. I had been having some troubles with my Heating, Ventilation plus A/C system lately and I had to call my local Heating, Ventilation plus A/C business. They sent me an Heating, Ventilation plus A/C specialist and it was her. My pal and I spent some time catching up before she even looked at the system. I loved that she was the one to come to my home because she showed me a lot of things about my system that I really did not know before. The most substantial thing she showed me was how to change my air filter. She even filled me in about air filters. There is a truly number that air filters receive. These numbers pretty much tell you how much air flow it will allow and how much debris it can catch. There are multiple that you can choose from however it really depends on what you are looking for identifiably. She opened up the Heating, Ventilation plus A/C unit and showed me right where the air filter was. She showed me the regular way to take it out and replace it. It was easy. That was truly the problem that I was having. She told me that now that I know how to change it I should not have any troubles. I should change it at least once a month to avoid any major troubles like I had been having before.