Reply To: Hot water base board, how much is enough?

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Avatar photoHarold Kestenholz
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    With an 85,000 btu boiler at 80% efficient output, you would be able to put the entire heat output into 120 feet or more of baseboard. If there is less than 120 feet of baseboard, there is not enough baseboard to do the heating job. Take a thermometer at the outlet of the boiler and the return of the boiler, if the water temperature does not drop more than 10 degrees F, you can use more baseboard. If the temperature difference is greater than 30 F, you may need to pump more water to get all the heat out of the baseboard.

    There is no magic rule-of-thumb for all buildings. The actual heat required can be estimated through a fairly simple process of calculation. The entire process is explained and can be done at: http://www.hydronic.net

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