If one cubic foot of Natural Gas is 1000 BTUH, what is the ratio of Combination Air?

The ratio of combination air refers to the amount of air that must be mixed with natural gas for complete combustion. In this context, a cubic foot of natural gas producing 1000 BTUH indicates the energy content that needs to be efficiently processed with the appropriate amount of air for optimal combustion.

In typical scenarios, the required ratio for complete combustion of natural gas is around 10 to 1, meaning that for every cubic foot of natural gas, 10 cubic feet of air are needed. This 10-to-1 ratio ensures that all the gas is burned completely and effectively, minimizing the emissions and maximizing energy efficiency.

Using this information, it's evident that the correct answer, which indicates a ratio of 10, aligns with the conventional understanding of combustion requirements in natural gas applications. The other options present ratios that would disrupt the balance needed for effective combustion, either supplying too much or too little air.