For a furnace to provide 50,000 Btu/hr of thermal energy to a living space, what should the rate of heat supplied by the fuel if the furnace efficiency is 75%?

Question

Quizplus · Accepted Answer

The furnace efficiency is 75%, meaning it converts 75% of the fuel's heat into useful heat for the living space. To find the required rate of heat supplied by the fuel, divide the desired output (50,000 Btu/hr) by the efficiency (0.75): 50,000 Btu/hr / 0.75 = 66,666.67 Btu/hr, which rounds to 67,000 Btu/hr.

For a Furnace to Provide 50,000 Btu/hr of Thermal Energy