hello,
I have a Worcester greenstart 440 Cdi combi boiler feeding a wet underfloor to my whole house. There’s one manifold upstairs and onedownstairs.
The underfloor manifolds have a trv to make sure the flow temperature remains at 40-50 (or even lessbecause I have a laminate floor).
I have nest thermostats in everyroom with a temperature probe forcut off to protect the floor etc so it’sall done properly.
One of the seals went near one of thetrv, So I changed that only to find it’scrusted up the trv itself. I can order a new one but in the mean time I justset the combi boiler flow to 45 C and removed the TRV so my heating stillruns.
I don’t have any radiators, and the combi feeds only the underfloor systems. I know the combi heating flow temperature usually needs to be around 70 C for it to condense and save energy when the exhaust hits 55-56 C, but is that more efficient than just running the boiler at 45 Cand removing the TRVs?
I read about low heat energy systems but I’m not entirely sure if a combi is very efficient at 45 C since doesn’t it heat exchange to save energy heating the tap water too? If the tap water ishotter than 45 C it will end up heating the pipe directly all of the time?
I’d be interested in your opinions onthis. Running the combi at 45 C is simpler and less prone to error, but is it efficient?
I have a Worcester greenstart 440 Cdi combi boiler feeding a wet underfloor to my whole house. There’s one manifold upstairs and onedownstairs.
The underfloor manifolds have a trv to make sure the flow temperature remains at 40-50 (or even lessbecause I have a laminate floor).
I have nest thermostats in everyroom with a temperature probe forcut off to protect the floor etc so it’sall done properly.
One of the seals went near one of thetrv, So I changed that only to find it’scrusted up the trv itself. I can order a new one but in the mean time I justset the combi boiler flow to 45 C and removed the TRV so my heating stillruns.
I don’t have any radiators, and the combi feeds only the underfloor systems. I know the combi heating flow temperature usually needs to be around 70 C for it to condense and save energy when the exhaust hits 55-56 C, but is that more efficient than just running the boiler at 45 Cand removing the TRVs?
I read about low heat energy systems but I’m not entirely sure if a combi is very efficient at 45 C since doesn’t it heat exchange to save energy heating the tap water too? If the tap water ishotter than 45 C it will end up heating the pipe directly all of the time?
I’d be interested in your opinions onthis. Running the combi at 45 C is simpler and less prone to error, but is it efficient?