I have some insulation to fit behind radiators on gas central heating system. The boiler is a condensing type and the timer an electro-mechanical has one channel but switch for HW & CH / HW only. May I drain only radiator piping circuit to remove radiators. Then while working on the insualtion and blasting and re-painting or radiators can I run the system on HW only with the radiator valves turned shut?
I'm not impressed wiith the range of insulations available for behind radiators I ended up going to Dodge City and getting polystyrene backed foil. Is there nothing better than this something with good insulating properties and a good fire rating (low smoke and fume, flame retardent, zero halogen etc.)?