A "Therm" is a unit of measurement used to quantify heat energy. It is commonly used in the natural gas industry to express the energy content of gas. One therm is equivalent to 100,000 British thermal units (BTUs), which is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. Therms are important for understanding energy consumption and costs in heating systems. They help consumers and businesses gauge their energy usage, particularly in relation to natural gas heating and energy efficiency measures. This unit aids in comparing energy sources and managing energy expenses effectively.