What does BTU stand for in heating and cooling terminology?

BTU stands for British Thermal Unit, which is a key measurement in heating and cooling systems. It represents the amount of heat energy needed to raise the temperature of one pound of water by one degree Fahrenheit. Understanding BTUs is essential in HVAC because it helps determine the amount of heating or cooling required for a specific space. This measurement allows HVAC professionals to size equipment appropriately for residential and commercial applications, ensuring energy efficiency and comfort. The accuracy of BTU calculations directly impacts a system's performance, making it a fundamental concept in the industry.