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US Edition - Today's top story: Why 78 degrees isn't the right thermostat setting for everyone during a heat wave View in browser

22 July 2026

US Edition

The Conversation
 

Top headlines

Lead story

It’s hot, electricity prices are high, and Americans are struggling to afford to stay cool. You might have heard public officials recommending setting your air conditioning systems to 78 degrees Fahrenheit (25.6 Celsius) to balance comfort and energy- and cost-efficiency.

But it’s not as simple as that, explains Destenie Nock, an engineering and public policy scholar at Carnegie Mellon University. Cooling equipment varies. The climate varies across the U.S. as well. And each person’s individual health needs are different too.

Nock explains how those elements factor into comfort and safety, and offers some key suggestions – with no or very low cost – for keeping yourself, your loved ones and your home cool as the thermometer climbs.

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Jeff Inglis

Environment + Energy Editor

 
Elbert Yazzie adjusts his air conditioning unit in Tuba City, Ariz., in 2025. Frederic J. Brown/AFP via Getty Images

Why 78 degrees isn’t the right thermostat setting for everyone during a heat wave

Destenie Nock, Carnegie Mellon University

There is no single thermostat setting that is right for every person or every home. And there are other easy, low-cost steps that can help keep everyone comfortable when hot weather sets in.

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