We are having a Valliant eco tec plus 831 boiler fitted with a VDC 430 Please could you advise the best internal place for this device to sit?( I appreciate that the outside temp probe has to go on a north facing wall). In the boiler or in a remote room? Presumably we will not need a room thermostat as this device already has one? Are there any further devices we will need? All Radiators will have TRVs
cheers
cheers