TGD L 2011 – 2.2.3.5 – BUILDING SERVICES Space heating and hot water supply system controls

2.2.3.5 The operation of controls should be such that the boiler is switched off when no heat is required for either space or water heating, i.e. boiler interlock. Systems controlled by thermostatic radiator valves should be fitted with flow control or other equivalent device to ensure boiler switch off.

C:BCARTGDtgd LTGD%20L%20DWELLINGS%20-%202011TGD%20L%20-%20DWELLINGS%202011%20-%20SECTION%202.2.3.5.pdf