Adding panel radiators to existing hydronic system with old cast iron radiators
I have an existing circulating hot water system in my 1920 row home with original cast iron radiators and a relatively new gas boiler. The system feeds the radiators with 2″ black pipe, that stems off from the main 4″ black pipe heat and return lines.
I’m renovating my basement floor (~40% below grade) that has no existing heat system. I’d like to modern panel radiators to the existing system, but I’m not sure this is possible.
For one, can I even feed a modern panel radiator with 2″ pipe, then adapt it at the inlet/outlet? Or, if I run smaller pipe to the new panel rads, will this cause a problem with the flow rate, considering the older radiators with 2″ pipes would be running on a much higher flow rate than the new radiators?
Would a separate zone be necessary to pull this off? Hoping this is not the case, as it may be cost prohibitive.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part