Smart thermostats first hit the market in the early 2010s as a way to strategically cut your electricity bill while still keeping your home nice and cozy.

Brands claim up to 26 percent savings on heating and cooling bills. But some experts say that’s an overstatement. The Environmental Protection Agency, for instance, estimates approved smart thermostats can save households about 8 percent on bills, or about $50 a year. A few independent studies say the savings are probably even lower.

So, how much money and energy do smart thermostats really save? And what are the environmental benefits?

Smart thermostats like Google Nest, Ecobee and Honeywell tweak your house’s heating and cooling based on your everyday habits. They use motion sensors and your Wi-Fi to know whether you’re home, and switch the heat and air-conditioning to energy-saving mode when you’re out. And,pnxbet you can connect them to your smartphone so you can make adjustments. (Which is not always good. More on that later.)

But the truth is that Mr. Biden will speak at a time of deep uncertainty about the future of America’s role in the world, including the war in Ukraine, escalating conflicts in the Middle East and growing economic competition with China.

Turning the heating or cooling back by seven to 10 degrees Fahrenheit during the eight hours you’re out for work or school can slash up to 10 percent from your utility bill, according to the U.S. Department of Energy.

“I’m a big fan. I think I own six of them,” said Christopher Roland Knittel, associate dean for climate and sustainability at the MIT Sloan School of Management. “The biggest benefit is when you land at the airport from a long trip and you’re able to turn the thermostat on before getting home.”

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