Vaillant EcoTec - 10mm pipework to radiators?

[McDoosh]

Hi, just about to bite the bulklet on a new boiler and radiators, Vaillant EcoTec Plus 32kW.

Is 10mm pipework to the radiators sufficient?

Thanks

 

[ShaunCorbs]

Existing system ?

 

[McDoosh229]

Existing system ?

Hi Shaun, the existing system is 15mm i think, but its ALL being renewed. Boiler, pipes, rads.

 

[ShaunCorbs]

Hi Shaun, the existing system is 15mm i think, but its ALL being renewed. Boiler, pipes, rads.

Then no 15mm copper would be best especially with part L of efficiency being law now where you have to design systems to be effective have they done a heat loss ?

 

[John.g]

Hi Shaun, the existing system is 15mm i think, but its ALL being renewed. Boiler, pipes, rads.

Depending on number of rads, 15mm copper (13.6mm ID) is fairly restrictive (compared to 22mm) requiring greater pump head/energy if you are referring to the main flow/returrn piping.