What is therm defined as in terms of gas fuel?

The definition of a therm in terms of gas fuel is precisely that it is a unit containing 100,000 British Thermal Units (BTUs). A BTU is a traditional unit of measurement for energy, specifically the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit at a constant pressure.

In the context of gas fuel, therms are commonly used as a billing unit for natural gas. This allows consumers to understand the quantity of energy they are using in a format that translates into cost. Understanding this unit is crucial for utility services specialists, as it aids in calculating energy consumption, billing, and cost comparisons.

The other options refer to different measures that are unrelated to the definition of a therm. Measurements of electrical power, water temperature, and air pressure do not pertain to the thermal energy unit used for gas fuel.