First time caller and love this site already.

Not much you can fool me on with hot air heat but that is easy.

My daughter just bought a house originally with steam heat and the addition has a hot water baseboard leg.

The boiler is a new GSA and it provides both the steam and hot water for the baseboard system.

I have been studying the ins and outs both steam and hot water systems but couldn't find much information about a hybrid system like this one (I don't even know the poper name for the mix and match set up),

What I have not been able to catch up to now is the following.

I know steam likes a pressure of between 1/2 and 2 pounds and hot water comes in at around 15 pounds.

How is this pressure differential separated in the boiler. I can only think that the return for the hot water goes directly into the liquid portion of the boiler at about the same 15 pounds and I have not been able to FIGYA how the pressure between the steam and hot water remains independent?

Anything else that is unique to this type of system that I should know about would be helpful also.

Thanks in advance for any help provided.

 

Check out Steam / Baseboard / Indirect

Go into the tech menu. They have a lot of good information on both hot water and steam systems. They briefly describe how to set up a steam system that has hot water baseboard and an indirect water heater. It may answer some of your questions.