In grade school (well before the internet/IoT age) the central heat would be blasting well into spring and the central air would run well into winter. The therm

In grade school (well before the internet/IoT age) the central heat would be blasting well into spring and the central air would run well into winter. The thermostats installed in every classroom did nothing at any point in the year. The excuse for this was always that "the district controls it from downtown." I don't know whether or not that was true, but a hacker certainly couldn't have done any worse.