One thing I think is when you get older your body swings.
I am reading this now as I am getting older.
The people I was with and I tend to be more warm or more frigid than every one of us were when every one of us were young. And this usually requires more heating and a/c. I have noticed that I am more sensitive to the outdoor heat and frigid than I was when I was a teenager and young adult. I find myself using the central heating and a/c idea more and in turn this means higher electric bills. So what I have done to help reduce this is I went out and got myself a portable space heating system for the Winter time when I get cold. This way I do not have to turn on the central heating idea as much and I can use a lot less energy running the portable space heater. Then in the Summer I do the reverse. Which is I got myself a portable cooling system. With the portable a/c idea I can entirely keep myself nice and cool in the warm afternoons separate from having to run the central a/c undoubtedly much. When it gets undoubtedly warm I have to turn on the central a/c for a bit and then go back to the portable cooling system. But still it saves me on the energy use I was spending by reducing my bills by almost half off what I had been paying. And this is great! Getting aged is not fun in the least. But I can handle it with my portable Heating and A/C equipment.