radiant heat zone from hot water radiator system?

kevin womac

the subject line says it. i have a newish crown boiler running a two-pipe hot water system through my 110 y.o. house. is flow rate, cycle frequency, and temperature sufficient to add a radiant heat floor in my enclosed porch? I've seen tons of info on a full radiant heat system, and how to embed one in a concrete slab, but no mention of how to retrofit, or nec. requirements of boiler.
any and all advice would be helpful
kevin

Brad White_25

Generally, yes

you could add a modest radiant slab area to an existing HW system.

I say this of course without knowing the details of your heat loss, radiation and boiler size, (all essential information!) but 99.9% of the time, boilers are oversized,
(The worse offense being larger in capacity than the radiation could ever emit).

So, adding more radiant area of whatever type is generally desirable. The least benefit is the ability to run your boiler at a lower temperature.

You of course understand that the radiant floor zone will have it's own circulator, manifold and means of reducing temperature. It almost always will need less temperature than other types of radiation.

Paul Pollets

Or...

Use an Oventrop UniBox directly piped to the radiator mains.

Search under Unibox on this site and you'll see pics and details. The UniBox will allow up to 12,000BTU's of radiant on a 1/2" supply and return.

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Boilerpro_3

And,

> you could add a modest radiant slab area to an

> existing HW system.

>

> I say this of course

> without knowing the details of your heat loss,

> radiation and boiler size, (all essential

> information!) but 99.9% of the time, boilers are

> oversized, (The worse offense being larger in

> capacity than the radiation could ever emit).

> So, adding more radiant area of whatever type is

> generally desirable. The least benefit is the

> ability to run your boiler at a lower

> temperature.

>

> You of course understand that the

> radiant floor zone will have it's own circulator,

> manifold and means of reducing temperature. It

> almost always will need less temperature than

> other types of radiation.