Just wondering how many people have their AC system maintained yearly by a professional. I have owned a home since 2012 and I only ever called an HVAC guy when my system was not working properly to to have them sell me a new unit. I had two new units installed at my duplex in 2016 and 2018 and I just called had a service done on them last week. I have not done anything to my house yet and not sure that I will as they system is 23 years old and super loud and inefficient. Im saving my pennies for a new one. Thinking about getting a nice two stage or variable unit but I will make that decision when I see how much they cost. I bet theyre high dollar.