Upstairs is 3-4° cooler than the living room, which we keep around 19° in the evening, the moveable thermostat (salus it500) is kept here. Trv’s are set to 4, which I believe is 20°.
I kept it upstairs for a day with trvs up there fully open and got it up to 17.8 on the landing but the boiler was on for a lot longer and the flow return temp was 56° ( flow temp set to 62°) so too high for condensing.
Vaillant eco tec 28kw combi, recently serviced and a chemical flush / magnaclean cleaned out of a load of crud. 8 radiators in total.
The bathroom seems especially cold, no trv and lockshield valve almost fully open, closing it to varying degrees has seemingly little effect, it cools down faster than any other rad but is also the smallest, 600 x 500 , it was never an issue with the old system boiler + HW tank.
Is the answer to put a much larger radiator in the bathroom? We can go taller but not wider, will that also help to reduce the return flow temp?
There is a good temperature differential across all the radiators, they all seem fairly well balanced.
How do I get the flow return temp down? Ideally under 50°
I kept it upstairs for a day with trvs up there fully open and got it up to 17.8 on the landing but the boiler was on for a lot longer and the flow return temp was 56° ( flow temp set to 62°) so too high for condensing.
Vaillant eco tec 28kw combi, recently serviced and a chemical flush / magnaclean cleaned out of a load of crud. 8 radiators in total.
The bathroom seems especially cold, no trv and lockshield valve almost fully open, closing it to varying degrees has seemingly little effect, it cools down faster than any other rad but is also the smallest, 600 x 500 , it was never an issue with the old system boiler + HW tank.
Is the answer to put a much larger radiator in the bathroom? We can go taller but not wider, will that also help to reduce the return flow temp?
There is a good temperature differential across all the radiators, they all seem fairly well balanced.
How do I get the flow return temp down? Ideally under 50°