What does BTU stand for?

BTU stands for British thermal unit, which is a unit of measurement used to quantify the amount of heat energy. Specifically, one BTU is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit at standard atmospheric pressure. This measurement is crucial in the fields of heating, ventilation, and air conditioning (HVAC), as it helps professionals determine the energy output and efficiency of heating and cooling systems. Understanding BTUs allows for proper sizing and selection of equipment to ensure effective climate control in buildings.