_______ _______ is the maximum amount of heat that can be produced if all the combustible materials, both contents and building materials, in a given area burn.

• A. Fire intensity
• B. Heat release
• C. Fire load
• D. Fuel load

Answer: (D)

Think about how much energy is stored in all the materials present in a space. The maximum heat that could be produced if every combustible item burns is governed by how much fuel is there to burn—the fuel load. The more fuel you have in contents and building materials, the higher the total heat that could be released once everything fully combusts. This distinguishes total energy potential from how fast that energy is released (fire intensity or heat release rate) or from the per-area measures used to describe heat release. In this interpretation, the fuel load is the quantity that sets the upper bound on heat production, so it’s the best answer.