What is the BTU/hour output of an electric heater rated at 15 kilowatts? (Reference: Smith, Russell E.. Electricity for Refrigeration, Heating, and Air Conditioning (p. 39). Cengage Learning. Kindle Edition.)
A) 51,180 BTU/hour
B) 45,000 BTU/hour
C) 51,000 BTU/hour
D) 52,000 BTU/hour