OR... maybe there are no windows that open?
My high school was a 1970ish addition to a building from the late 1800s or early 1900s. The “old” high school is now the junior high.
The new school was going to be a marvel of climate control... comfortable year-round, As such, there were no windows that opened. The problem was that they ran out of money about the time the AC should have been purchased...
I live in MN, which is cooler than where many of you live, but we still get some hot and humid weather. Put a sealed brick building in the hot sunshine, with class sizes routinely approaching 40 kids... and you have a recipe for dangerously high temps.
The junior high, meanwhile... remained relatively comfortable. It was shaded from the south by the new high school, had some remaining shade trees around it, and had the windows open to catch the breeze.
Progress... :mrgreen: