Jul 03 2012 · WATER HEATING FORMULAS . BTU Per Hour Requirement. BTU OUTPUT = GPM x Temperature Rise x 8.33 Lbs/Gallon x 60 Minutes . BTU INPUT = (GPM x Temperature Rise x 8.33 Lbs/Gallon x 60 Minutes) % Efficiency . Heat Transfer Efficiency % EFFICIENCY = (GPH x Temperature Rise x 8.33 Lbs/Gallon)
Jan 29 2021 · Boiler settings the temperature you set your boiler to is the temperature at which it heats water and youll want the temperature to be no higher than you need. For your heating the ideal temperature setting is around 70°C. And for your hot water its 60°C.