How is the room temperature regulated when there is no room thermostat?
6) There must be a room thermostat to control room temperature. I assume that you are talking about with a water to water system. In this case the thermostat will generally come with the hydronic side of the system. All the water to water system does it heat a tank of hot water. The hydronic side decides which zone turns on and how long it runs based on the room temperature.
