Hello all,
I have recently added a further 3 radiators and an additional 14m approximately of pipework to incorporate an extension.
I have been to a site where it indicates the flow required and the BTU that the pipe size can manage etc but there was no indication of the pump requirements. Apart from a "suck it and see" scenario is there anyway of calculating the pump specifications? How do builders determine the correct size pump for a new installation?
Mark