Opinion | I Swore Off Air-Conditioning, and You Can, Too

Whenever people ask me how my wife and I have endured 25 Kansas summers almost entirely without air-conditioning, I like to say we do it because air-conditioning makes it too hot outside. We’re not ascetics, Luddites or misers; we just want to keep living comfortably, indoors and out.

It’s not just that air-conditioning is making our summers even hotter. (On a sweltering night in a city like Houston, the hot air that A.C. units blast out over the streets can raise outdoor temperatures up to three or four degrees.) It’s also that air-conditioning has altered the way most Americans experience heat.

Our bodies have grown so accustomed to climate-controlled indoor spaces, set at a chilly 69 degrees, that anything else can feel unbearable. And the greenhouse gases created by the roughly 90 percent of American households that own A.C. units mean that running them even in balmy temperatures is making the climate crisis worse.

Of course, I’m not suggesting that anyone switch the air off in the middle of a heat wave. Year in and year out, heat waves kill more people than any other type of natural disaster. If you live in Miami or Phoenix, you need air-conditioning to survive the summer. But if you live in the middle of the country, try leaving the air-conditioning off when it’s hot but not too hot.

Our species evolved, biologically and culturally, under wildly varying climatic conditions, and we haven’t lost that ability to adapt. Research suggests that when we spend more time in warm or hot summer weather, we can start feeling comfortable at temperatures that once felt insufferable. That’s the key to reducing dependence on air-conditioning: The less you use it, the easier it is to live without it.

When I was growing up in Georgia, my family moved into our first air-conditioned house when I was 12, and I loved it. But I left home for college in the 1970s, and I’ve lived mostly without A.C. ever since.