Hello,
I am sure I read here a post stating how many radiators you could feed of certain pipe sizes: the bigger the pipe diameter, the greater the number of kW. Can anyone tell me where to find this information?
We have had a new boiler, so I understand I need to oversize the rads because the delta T is smaller with condensing rads. We used to have two rads in the lounge (5m x 3m ish - the lounge, not the rads!) but SWMBO would like just one long rad. I have used some rad calcs and I think we need something about 3kW or 11-12,000 BTU. Does that sound about right?
I was wondering whether I could feed this and the hall rad off the existing 15mm pipe or whether I needed to upgrade to 22mm?
TIA Stephen.