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Fin-Tube Baseboard

CMadatMe Member Posts: 3,086
Does anyone have or know where I can find the formula that is used to calculate btu output for fin-tube baseboard. Baseboard charts give you the average ratings at 150, 160, 170, 180. None give you the 155, 165,175  average ratings.

Example. Suntemp 700 Series at a water temp of 170 degrees and a flow rate of 2gpm gives you 514 btus a foot and at a water temp of 160 degrees with the same flow rate 442 btu's per foot. What will it give me with a 165 degree water temp at the same flow rate of 2GPM?
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