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Posted by steve on December 02, 2007 at 19:26:41:
In Reply to: Re: Convector and recessed radiator EDR calc posted by HeatPro on December 02, 2007 at 17:10:03:
What type of person do I hire to do such a conversion? Can a GC do it or am I better of with some sort of consultant helping the process along?
: ++ What's 'normal'? You'd change when the old steam boiler died. Then it would be worth it over the next decades.
++++That sounds like at best a 10+ year payback versus just a new steam boiler.
: : How can you run the water at the same temperature as the steam?
: ++ Set the high limit to 225F. Steam or water inside a radiator at 215F provides the same heat output.
++++Won't the water be steam above 212F or not because of the system pressure or does it get superheated? Can PEX take such hot water?
: ++ When the new boiler is a water boiler it will be smaller right away as you'd size for the actual heat loss instead of total steam radiation plus 50%.
++++ Is the heat loss always less than the steam system size? What about rooms that haven't needed heat with the steam system such as an enclosed porch mudroom? I am concerned these may not get warm enough with hot water.