My mother and father have always had central heating and air conditioning. I couldn’t imagine what it would be like to not have central HVAC. When I moved in with my girlfriend, she only had window air conditioning units. I asked why anyone would choose to use window AC units and not have central air conditioning. She told me the house originally belonged to her grandparents, and there wasn’t central HVAC in the house. They had total electric heating and the window AC units were in excellent condition. She would not get rid of the electric heat just so she could have central air conditioning. I was a bit at odds about window AC units, but I wanted to be with her, so I would not complain too much. I wanted to do more than complain as I thought about how much energy was being wasted, but I didn’t. I figured she would figure it out eventually, and she paid the electric bill. After a couple of weeks, I wasn’t worried about the electric heating. The energy bill wasn’t nearly as high as I had thought it would be, and I was happy with how comfortable it was in the house. The house was older, and I was sure it didn’t have good insulation, but it surprised me at how warm it was, and how little it cost to run the electric heat. I figured I would learn more about window air conditioning when summer arrived, but until then, I was happy living where I was and the house was warm and comfortable.