Posted by Harold Kestenholz - Hydronic Network on January 04, 2000 at 20:06:07:
In Reply to: cold radiator posted by gary on January 04, 2000 at 17:33:43:
This is a normal situation for an abnormal application. The thermostat is downstairs, so it senses the heat produced by long-heating and cooling down cast iron radiation. By the time the radiation downstairs cools down, the upstairs elements have long since given up their heat. There will be wide swings of temperature upstairs. When you turn the thermostat up a few degrees, the boiler is forced to run longer to make the downstairs radiators heat longer and therefore force the upstairs radiators to stay heated longer. Cast-iron radiators work better with cast iron baseboard upstairs. There are small cast radiators by Burnham that recess in the wall that would work better than the copper-tube baseboard.
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