BTU is the abbreviation for what?

• A. British Thermal Unit
• B. Barometric Temperature Unit
• C. British Thermodynamic Unit
• D. Biothermal Unit

Answer: (A)

BTU is a unit of energy used to measure heat. It stands for British Thermal Unit, defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. In HVAC, capacities are commonly given in BTU per hour (BTU/h), indicating how much heat energy a system can transfer in one hour. The other expansions aren’t standard terms in this field, so they aren’t used in practice.