Learned this lesson late in life. Wish I'd learned it earlier so thought I'd share:

I used to use my central air and my monthly electric bill used to be about $160/month. I shut off my central air and started using a window mounted AC unit in the window of my computer/tv/weight room (I'm there most of the time anyways) and my monthly electric bill went down to about $60/month. Considering the AC unit cost a little over a hundred bucks, this one purchase has saved me thousands of dollars over the last few years. I can think of many better things I'd rather be spending that money on than cooling down my kitchen. I turn on the central AC only when company is coming over. This kind of living is only possible because I'm MGTOW. Live well gents.