About Units

Kilocalories per hour: Kilocalories per hour (kcal/h) is a unit of power commonly used to measure heating or cooling capacities. One kilocalorie per hour is the amount of energy needed to raise the temperature of one kilogram of water by one degree Celsius in one hour. It is often used in heating and cooling applications.

Tons of refrigeration: A ton of refrigeration (RT) is a unit of power used to describe the heat-extraction capacity of air conditioning and refrigeration equipment. One ton of refrigeration is equal to the rate of heat transfer needed to freeze 1 ton (2000 pounds) of water at 0°C in 24 hours, equivalent to 12,000 BTU per hour or approximately 3.517 kilowatts.