Hi there,
We had a new combi boiler installed and decided to change the radiators at the same time. I went on to numerous websites calculating the appropriate Btu's and sent these to the plumber who agreed they were correct and stated he would base the radiators on these calculations.
We have noticed that the house was colder and struggled to get to 18 degrees even after the heating has been on for over 5 hours.
The radiators were very hot to the touch and the boiler temp is turned up to maximum.
I therefore checked the radiators (prorad) and noted that the BTU output quoted was a lot lower that agreed with the Plumber. The plumber has stated that the radiators do meet the BTU outputs according to his chart. I have yet to see this.
I based my figures on the European standard of delta T50. The only way I can see that he could get anyway near the required BTUs is to work off a delta T70.
Am I correct in working off Delta T50 to correctly size the radiators.
many thanks for you help
We had a new combi boiler installed and decided to change the radiators at the same time. I went on to numerous websites calculating the appropriate Btu's and sent these to the plumber who agreed they were correct and stated he would base the radiators on these calculations.
We have noticed that the house was colder and struggled to get to 18 degrees even after the heating has been on for over 5 hours.
The radiators were very hot to the touch and the boiler temp is turned up to maximum.
I therefore checked the radiators (prorad) and noted that the BTU output quoted was a lot lower that agreed with the Plumber. The plumber has stated that the radiators do meet the BTU outputs according to his chart. I have yet to see this.
I based my figures on the European standard of delta T50. The only way I can see that he could get anyway near the required BTUs is to work off a delta T70.
Am I correct in working off Delta T50 to correctly size the radiators.
many thanks for you help