Determining the amount of gaseous fuel used involves considering several factors, including the heating value of the gas, the efficiency of the appliance burning it, and the duration of use. For example, a furnace rated at 80% efficiency using natural gas with a heating value of 1,000 BTU per cubic foot operating for one hour will consume more energy than a smaller, more efficient water heater using the same fuel source for the same period. The volume used can be measured directly through meter readings, or estimated based on appliance specifications and usage patterns.
Accurate assessment of energy use provides crucial data for various applications. It allows consumers to understand and manage energy costs, facilitates comparisons of energy efficiency between different appliances, and informs decisions about equipment upgrades or replacements. Historically, manual calculations based on meter readings were the primary method. Advances in metering technology now allow for automated data collection and more precise tracking, contributing to better energy management practices in residential, commercial, and industrial settings.