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Posted by Scott Ruffner on January 26, 2004 at 05:14:39:
In Reply to: Re: National Gas Co. Boiler - not very hot supply temp. posted by Harold hydronicnetwork.net on January 22, 2004 at 13:19:37:
: Don't bother installing the ball valves; the system is not designed for each section of room radiation to be controlled individually by valves.
Just a final follow-up for anyone who finds this exchange via a search engine: wrapping the radiators in the room with the thermostat worked perfectly and the duty cycle for the system is now long enough for the boiler supply temperature to come up to 160F. The system now cycles between 130F and 160F, rather than 60F to 90F.
There were three large baseboard radiators in the living room (the most central location in the house) where the thermostat for the system was located. These radiators were each 2x as long as any other radiator in the house, and were the first units in the system to get hot water from the boiler. The contractor appears to have used a "where there is a window, put a radiator, the same size as the window" rule for sizing the radiation in each room. The house was built in 1949, with no insulation or storm windows. At some point both were added. I have completely covered all of the radiators in the room with the thermostat with aluminum foil, and there is now good radiation in all of the further out rooms.
The house has a back room that is an enclosed porch - it doesn't have enough heat, and whoever enclosed it added baseboard electric to supplement. I think this summer I'm going to re-locate one of the large livingroom radiators (or maybe two) to that back porch.
This forum/bulletin-board is awesome!
I have completely covered all three of them, and am just relying on the
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