23-01-12, 09:30 AM
generally if you haveĀ a gravity fed system, the pump circulates water to your rads, and is switched on and off by the room stat.( or by switching the boiler off at the mains)
more sophisticated systems have motorized valves and hot water may be pumped. Its hard to make generalizations.
more sophisticated systems have motorized valves and hot water may be pumped. Its hard to make generalizations.