1파운드의 물을 화씨 1도 올리는 데 필요한 열량의 단위.
A unit of heat energy representing the amount of heat needed to raise the temperature of one pound of water by one degree Fahrenheit.
예문:
"The air conditioner has a cooling capacity of 12,000 BTUs."
"Natural gas is often priced based on its BTU content."