B
bendy21
Hi All,
Have a problem at home and was hoping someone could advise.
I have a Statesman Flowsure + combi at home with the burner set to give 26KW output. The house is a semi-detached 5 bedroom with 10 rads ( 3 x 1100 doubles, 4 x 800 doubles, 400 x 1100 towel rail, 400 double & 600 double). Hot water requirements are the kitchen sink, two small cloakroom basins, a bath and a newly installed shower with Deva thermostatic mixer.
The heating works a treat with the rads heating up very quickly. The problem i have is the hot water when filling the bath or running the shower. It initially comes out nice and hot but after a minute becomes barely hot at all. I have backed the DHW flow back to 10-11 L/min but am still have the same trouble. The boiler seems to be struggling, with the main boiler temp dropping down to 58'c even when constantly running on DHW demand and the output from the heat exchanger barely 40'c. The boiler has been serviced and new cold and hot water 15mm pipes installed due to a house layout change. The exchanger has also been flushed. I don't believe there is anything more i can do to the current boiler and believe it just isn't upto the job, especially with the new shower install.
I believe the viable options are to either upgrade to a combi boiler that has better DHW performance or change over to a conventional boiler and have a main fed copper cylinder to ensure i have a good supply of 55'c DHW to hand when required. With the cost of oil continuously creeping up i don't feel that increasing the boiler size above 26KW will be benficial, as my fuel bill will go up and it will be a O.T.T for my central heating requirements, which I reckon is about 18Kw. Also i am not in a financial position to buy new so would be looking at a second hand solution. By changing over to convential system with cylinder i believe is could in fact go down a size, to around 20KW output.
Any help much appreciated.
Regards
Ben
Have a problem at home and was hoping someone could advise.
I have a Statesman Flowsure + combi at home with the burner set to give 26KW output. The house is a semi-detached 5 bedroom with 10 rads ( 3 x 1100 doubles, 4 x 800 doubles, 400 x 1100 towel rail, 400 double & 600 double). Hot water requirements are the kitchen sink, two small cloakroom basins, a bath and a newly installed shower with Deva thermostatic mixer.
The heating works a treat with the rads heating up very quickly. The problem i have is the hot water when filling the bath or running the shower. It initially comes out nice and hot but after a minute becomes barely hot at all. I have backed the DHW flow back to 10-11 L/min but am still have the same trouble. The boiler seems to be struggling, with the main boiler temp dropping down to 58'c even when constantly running on DHW demand and the output from the heat exchanger barely 40'c. The boiler has been serviced and new cold and hot water 15mm pipes installed due to a house layout change. The exchanger has also been flushed. I don't believe there is anything more i can do to the current boiler and believe it just isn't upto the job, especially with the new shower install.
I believe the viable options are to either upgrade to a combi boiler that has better DHW performance or change over to a conventional boiler and have a main fed copper cylinder to ensure i have a good supply of 55'c DHW to hand when required. With the cost of oil continuously creeping up i don't feel that increasing the boiler size above 26KW will be benficial, as my fuel bill will go up and it will be a O.T.T for my central heating requirements, which I reckon is about 18Kw. Also i am not in a financial position to buy new so would be looking at a second hand solution. By changing over to convential system with cylinder i believe is could in fact go down a size, to around 20KW output.
Any help much appreciated.
Regards
Ben
