After reading some articles on the effects of fitting TRV's to radiators where it may increase the return water temperature to condensing oil boilers and thus reduce efficiency of the boiler when all valves are closed, What can i do to control the return water temperature to the boiler if these valves are fitted to my system? If i fit a mixing valve will this help to maintan the return flow temperature to around 55 C into the boiler and achive the magic condensing mode with better efficiency results when all the valves are closed, or do i fit a bypass valve in some configuration to control this? Or is it all waste of time fitting TRVs as you boiler efficiency and this would conter act any gains you made by controlling room temperature in the first place. please what is the best way to plumb this system to maximise efficiency? The system will be three zones . Upstairs standard radiators fitted with TRVs maybe... downstairs solo convector radiators andthe 3rd zome DHW all heated by grant vortex condensing boiler.
- posted
17 years ago