Question: How does the RT100 work with my boiler?
Answer: The RT100 is a hard wired non-programmable thermostat. It works like any other dial thermostat. You set the temperature, with the dial, to what you do not want the room to fall below. Every time room temperature falls below set temperature the internal relay closes to send power to boiler to turn it on, when set temperature is reached it opens internal relay to stop providing power to boiler, turning it off.