S
sdsparks
Is it law that a sealed central heating system needs a minimum level of interlock from a safety point of view I know the answer is yes from an efficiency point of view, came across a sealed central heating system today with no room thermostat. The way I see it is there is no means to shut down the boiler once the room is at temperature, therefore the water in system will expand until the PRV blows or th boiler over heats right?