Then there were the thermostats.
Growing up, my father was in the Army so we moved from place to place constantly. It seemed like we never stayed in a single location for more than a year. Every base was different and so were the houses we stayed in. Most of the time, we just lived in base housing. It was easier that way. Some bases had nice houses. Other houses were infested with mold and bugs and falling apart. Another thing that I found interesting were the Heating, Ventilation, and A/C systems in all of the different kinds of houses. Every one of them had central heating and cooling! However, how well the heating and cooling operated was a total crap shoot. Some houses had new Heating, Ventilation, and A/C systems that were well inspected and worked well, but those were hard to come by. In most cases, the Heating, Ventilation, and A/C systems were ancient and there was a lot of dust in the HVAC duct. They broke down from time to time because of it. I remember this one home where the gas furnace didn’t work. It only was lukewarm no matter how high you set the thermostat. In another home, the air conditioning broke down 6 times in just under 2 years. Each time it broke down, we had to wait over a week before it was fixed. Then there were the thermostats. We had dial thermostat or analog thermostats and no one was like the other. 68 degrees in one home was a much different temperature than 68 degrees in another home. I don’t know exactly if that is because the thermostats weren’t calibrated or if it had to do with the design of the house.