Devices controlling heating units

Usage examples of thermostats.

And in 1956 they put 220 volt wall heaters with manual switches and thermostats both into every room of the house.

And I went around turning off lights not in use, and lowering thermostats when people left rooms, so in my estimation --such a thing is admittedly very hard to estimate-- I actually saved them money on their utility bills.

You'll balance her budget, turn down the thermostats to save money on the heating bill --"

Or programs that mimicked division of labor among termite colonies to control thermostats in a skyscraper.