Assertion: electric heater's thermostat | /r/Causes | small electric motors
Facets:
value: with zoned systems
type: OTHER
Source sentences:
text: With zoned systems (some residential, many commercial systems — several thermostats controlling different "zones" in the building), the thermostat will cause small electric motors to open valves or dampers and start the furnace or boiler if it's not already running.