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Automated Lighting, 2nd Edition by Richard Cadena

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APPENDIX C: Conversion Factors

 

Power and Energy

1watt = 3.41BTU/hour

1000BTU/h = 293W

1horsepower = 2544BTU/h

1ton of air conditioning = 12,000 BTU/h

1BTU = 1.0545kJ

1kWh = 3.6 MJ

1BTU = 0.293 071Wh

1horsepower (metric) = 735.498 75W

1horsepower (European electrical) = 736W

1horsepower (imperial electrical) = 746W

1ton of air conditioning = 12,000BTU/h = 12000/3.414W = 3515W

Temperature

temp (K) = temp (°C) + 273.15

temp (°C) = temp (K) − 273.15

temp (°C) = [temp (°F) − 32] ÷ 1.8

temp (°F) = temp (K) × 1.8 − 459.67

temp (°F) = temp (°C) × 1.8 + 32

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