btu

• Единица тепловой энергии, определяемая как количество тепла, необходимое для повышения температуры одного фунта воды на один градус Фаренгейта при постоянном давлении в одну атмосферу, что эквивалентно примерно 252 калориям.

A unit of heat energy, defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit at a constant pressure of one atmosphere, equivalent to approximately 252 calories.

uncountable · proper noun

1. British Thermal UnitC1formalscientific

   A unit of heat energy equal to the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit at one atmosphere of pressure.

   Британская тепловая единица

   • The air conditioner has a cooling capacity of 12,000 BTUs per hour.
   • One BTU is approximately equivalent to 251.997 calories.
   • Heating systems are often rated by their BTU output.