I am going to be plumbing my central heating (not the boiler).
I am not sure if I should use 15mm or 10mm from the main runs to the radiators!
As I see it there are Pros and Cons to each, as I see them:
10mm (microbore) is easier to work with, requires less notching of joists, and I can burry it easily in conduit in the wall and there is less water in the system to heat up (reducing the cost of warm up).
But its not much cheaper than 15mm, it comes on coils and can be messy, I have my doubts if it can deliver to any radiator over 2500 BTU and I wonder if the radiators will take longer to heat up in addition the heat loss will be greater than from a 15mm pipe.
15mm it neater (straight lengths) it can definitely supply upto 10000 BTU, it looses less heat and should get the radiators quick faster.
But it is difficult to run through 20mm conduit and 25mm conduit in stone is hard damn work (I don't want it in chunky trunking cause that looks worse than the pipes directly on the surface). Also I am heating a lot of water during the warm up phase that I do not need to.
All of this is based on my limited knowledge, any advice would be much appreciated. Which system is more efficient?
Do you get cool rads with 10mm (I know you do with 8mm)?
Thanks
andy
I am not sure if I should use 15mm or 10mm from the main runs to the radiators!
As I see it there are Pros and Cons to each, as I see them:
10mm (microbore) is easier to work with, requires less notching of joists, and I can burry it easily in conduit in the wall and there is less water in the system to heat up (reducing the cost of warm up).
But its not much cheaper than 15mm, it comes on coils and can be messy, I have my doubts if it can deliver to any radiator over 2500 BTU and I wonder if the radiators will take longer to heat up in addition the heat loss will be greater than from a 15mm pipe.
15mm it neater (straight lengths) it can definitely supply upto 10000 BTU, it looses less heat and should get the radiators quick faster.
But it is difficult to run through 20mm conduit and 25mm conduit in stone is hard damn work (I don't want it in chunky trunking cause that looks worse than the pipes directly on the surface). Also I am heating a lot of water during the warm up phase that I do not need to.
All of this is based on my limited knowledge, any advice would be much appreciated. Which system is more efficient?
Do you get cool rads with 10mm (I know you do with 8mm)?
Thanks
andy