In 2021, when the environmental advocacy group Center for Climate Integrity set out to examine air conditioning, its researchers collected information on more than 150 schools and school districts across the country. They found that in places where temperatures historically hit 80 degrees Fahrenheit at least 32 days during the academic year, the vast majority of schools already had air conditioning.
Using this as their threshold for when AC is needed, they modeled what it would cost to keep schools cool in the near future under a moderate warming scenario. Their answer: more than 13,700 public schools in the United States. that did not need air conditioning in 1970 need it today. Some have already installed it, some are working on it now and some can only dream of having enough money.
The estimated cost of this huge investment exceeds $40 billion.
Paul Chinowsky, a professor emeritus of engineering at the University of Colorado at Boulder who led the analysis, said it showed two distinct trends in America: Northern school districts experiencing hotter school year temperatures that are overheating classrooms and forcing closures, especially in old buildings without enough electrical capacity to run air conditioners. And Southern districts with aging cooling systems outmatched by abnormally hot weather.