How does the heating value of butane compare to that of propane?

Butane does indeed have a higher heating value than propane. The heating value of a fuel is a measure of how much energy can be obtained from a certain volume or mass of that fuel when it is combusted. In the case of butane, its higher carbon content allows it to release more energy per unit when burned compared to propane.

Specifically, the heating values are often measured in British Thermal Units (BTUs). Butane has a higher energy content — typically around 3,200 BTUs per cubic foot — whereas propane's heating value is generally around 2,500 BTUs per cubic foot. This difference is crucial in applications where energy efficiency and the amount of fuel needed are concerned.

Understanding this distinction can influence the choice of fuel for heating applications, as butane may require less volume to achieve the same heating effect as propane. This highlights the importance of selecting the appropriate fuel based on its heating characteristics for specific applications in compliance with the National Fuel Gas Code.