Hi,
I'm posting here really for a second opinion as we're a bit confused right now! I'll try and be brief. We're renovating a house which we've completely stripped back, as part of the renovations we had a local gas engineer company come out and run new pipework for our gas supply, hot and cold and flow and return to the location where the boiler will be re-installed and where our rads wil go upstairs. Downstairs heating is through an UFH system which is installed and ready to be connected up.
We've just had a different gas enginner company come out to re-fit the boiler (a Worcester Bosch 30i Combi) and he's noticed the orignal company used 15mm copper pipe for the upstairs rads. His opinion is the "back bone" should have been in 22mm with 15mm coming off this for each rad. I don't belive he was touting for work and his comments seemed genuine, his reasoning (forgive me on my limited knowledge) was that the boiler wouldn't be able to cope with powering the UFH downstairs and the upstairs rads if they were both on high at the same time. The system would work using 15mm but long term could develop problems. The company that originally completed the pipework have said that because the property is small and the rads are small that it should be fine as the UFH has a separate pump and the boiler will just be powering the 3 rads.
A few points:
Is there a right or wrong answer to this or it just the personal preference of the engineer?
Any adivce would be appreciated.
Thanks,
James
I'm posting here really for a second opinion as we're a bit confused right now! I'll try and be brief. We're renovating a house which we've completely stripped back, as part of the renovations we had a local gas engineer company come out and run new pipework for our gas supply, hot and cold and flow and return to the location where the boiler will be re-installed and where our rads wil go upstairs. Downstairs heating is through an UFH system which is installed and ready to be connected up.
We've just had a different gas enginner company come out to re-fit the boiler (a Worcester Bosch 30i Combi) and he's noticed the orignal company used 15mm copper pipe for the upstairs rads. His opinion is the "back bone" should have been in 22mm with 15mm coming off this for each rad. I don't belive he was touting for work and his comments seemed genuine, his reasoning (forgive me on my limited knowledge) was that the boiler wouldn't be able to cope with powering the UFH downstairs and the upstairs rads if they were both on high at the same time. The system would work using 15mm but long term could develop problems. The company that originally completed the pipework have said that because the property is small and the rads are small that it should be fine as the UFH has a separate pump and the boiler will just be powering the 3 rads.
A few points:
- The run from the boiler location to the furtherest rad is about 15m.
- The upstairs rads are: 1 x 2,792 BTU's (818 Watts), 1 x 4,725 BTU's (1,385 Watts) & 2510 BTU's (736 Watts)
- The UFH system is split up into 2 zones (21m2 & 13m2).
Is there a right or wrong answer to this or it just the personal preference of the engineer?
Any adivce would be appreciated.
Thanks,
James
