Hello all. I have a quick question regarding my cast iron radiator set up in my very old house. My house is over 100 years old and only one zone for the whole house. This spring, I am going to run another zone to the back bedroom/office/hallway, as these room are all very small and have 3 small radiators combined. The problem of course is that the living room where the thermostat is, is directly above the boiler and the L.R. stays nice and toasty warm most of the time partly due to the ambient heat that the boiler gives off, but my back room(s) are a bit cooler because of the L.R. not needing heat and not turning the C.P. on.
Anyway, this is why I want to add a separate zone for the back room to eliminate this issue. Now, my house's radiators seem to be plumbed in a circle pattern. The radiators seem to be fed off of 2 circles if you will. One circle for the hot supply and one for the cooler return. I have included a rough diagram of how i think it is basically set up. I am not sure if the hot is a complete circle or as I have it because the piping is in a very very small crawl space after it leaves the part of my basement where the boilers are. For simplicity, I have not included the 2 boilers that I have in the diagram. (one oil and the other coal of course)
I have been going over some ideas how to do this and have been making some diagrams for myself, which i wont include at this time because it is kind of messy and a little incoherent unless you are the author. lol.
I was thinking/hoping it would be as simple as cutting, capping where needed, and splicing new lines into areas that need them along with some back flow preventers where needed. For imagination's sake, the radiators in the diagram that i need a new zone for are the 3 on the left side starting at the bottom.
Thanks in advance.
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