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How do you figure out how many BTU's are produced by the human body ,pedaling their dupa off on a stationary bike ,for 45 min. So far, I've been told that upto 2 liters of sweat can be produced by the pedalist.How do you convert that into BTU's. Is this related to 970BTU per lb. of water?This KindaSorta relates to the previous thread on evap/cond coil & under/over sizing.There are 45+ bodies doing this all at the same time in the same room!