About Units

Btu per hour: BTU per hour (BTU/h) is a unit of power that describes the power of heating and cooling systems, such as furnaces, ovens, and air conditioners. One BTU per hour is the rate at which one British Thermal Unit of energy is transferred in one hour. For example, the cooling capacity of a residential air conditioner might be rated at 10,000 BTU per hour.

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.