A British Thermal Unit (BTU) is a unit of measurement used to quantify the amount of heat energy. Specifically, it represents the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit at a constant atmospheric pressure. BTUs are commonly used in various fields, such as heating, ventilation, air conditioning (HVAC), and energy production. For instance, HVAC systems often have ratings in BTUs to indicate their heating or cooling capacity.
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