My mom has had the same car since she turned 16. That makes the car just over 50 years old. It still runs perfectly, and she uses it to drive around town every day. Can you imagine having one car for your whole life, and being cool with it? First of all I would get bored and need a change at some point, and secondly how can it keep running this well? She babies it, that’s her style, taking the best possible care of it, and this is the result. She is the same way with her HVAC system, which I believe she got around the same time I was bored. The doctors told her I needed a lot more humidity in my air quality because of my lungs, so she got her very first air conditioner installed just for me. It turns out that she only ever ran the AC when I was there, so after I moved out for college she only used it when I came home to visit. That combined with regular HVAC inspections and upkeep from a local company is what made her cheap little air conditioner last for all these years. I just turned 35, and I don’t see how any air conditioner can work for over thirty years without being replaced, it staggers the mind! The last time I visited her I looked at the thermostat and saw that it was covered in dust, having not been used in months. I turned it on, and I swear to you the AC was as crisp and cold as it has ever been.