running hot water through cast iron radiators

Bryan_17

New construction job: 1. What is the best way to pipe in a hot water system using recessed cast iron sun rads?
2. How do I figure heat loss calculation?

Steamhead

First

click on the "free heat loss calcs" link at the upper left. This will get you Slant/Fin's calc program which is very easy to use.

Once you know what your heat losses are you can determine your water temp and size your Sunrads.

Piping the Sunrads can be done several ways. You can use a Monoflo system (one main with diverter tees) or a two-pipe system. Two-pipe can be done using a flow and return main, or each rad can be a "home run" to a manifold in the boiler room.

The best method depends on the building's layout and the degree of control you want.

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