Adding radiant heat to existing steam system

Bob Gagnon plumbing and heating

injectin pumping with cont. circ. bob

Dave Payette

Adding radiant heat to existing steam system

I own a 100 year old house with a one-pipe steam system and large cast iron radiators. My hot water is heated off the boiler and stored in Thermo 40 gallon tank. We are about to add a 2 story, 1000 sf addition, and I would like to put in-floor radiant heating. Can I use my existing boiler/water heater or do I need a separate system for the addition? I really want to do whatever makes the most sense.

[Deleted User]

it depends on the size of three things,

1) the steam load
2)the new addition hot water heat load
3)the boiler size

check here for more info...

http://www.heatinghelp.com/newsletter.cfm?Id=29

Noel

Bob Gagnon plumbing and heating

tankless heater

i ran a large addation off a steam boiler using a 3/4" tankless and it worked great. bob

Dave Payette

The water running through the system is usually only 80-90 degrees or so. Did you need some sort of heat exchanger or mixing system to bring the temperature down?