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.

Joules per second: Joules per second (J/s) is a unit of power equivalent to watts in the International System of Units (SI). One joule per second is the rate at which one joule of energy is transferred or converted in one second. It is commonly used in scientific contexts to measure energy transfer rates.