btu
/biː tiː ˈjuː/
noun
- British thermal unit, a unit of energy used to measure heat, especially in heating and cooling systems.
- A BTU is roughly the amount of energy needed to heat one pound of water by one degree Fahrenheit.
- The furnace's output is rated at 80,000 BTUs.
- This air conditioner can remove 12,000 BTUs of heat per hour.