Hello, I currently have a hot water system with cast iron raditors. Each raditor in each room has a supply and return pipe. In the near future i plan on installing baseboard heating. My questions is can i have just 1 supply and 1 return for an entire floor (residential)or do i have to have separate rtn/sply for each room? If so, please let me know the pros and cons of each. Thanx
By having a separate supply main and a separate return main, you can have independent heating control of each radiator or baseboard. You can remove a radiator or baseboard and have heat in the remaining heaters.
A one-pipe system can also give individual control of each radiator and with valves on the supply and the return of each, you can remove or replace radiators.
By running the tubing from one radiator to the next, you lose individual control of radiation, unless you use a bypass thermostastic control; although there would be no savings by doing so. A series loop would be controlled by a zone valve so all radiators in the loop would be on and off at the same time.