Final answer:
The standard method to determine combustion air requires a minimum volume of air per 1,000 Btu/h. For natural gas, the minimum required volume would be approximately 40 cubic feet per 1,000 Btu/h, while for liquid propane, it would be a little less than half-a-gallon (about 2 liters) per 1,000 Btu/h.
Step-by-step explanation:
The standard method to determine combustion air requires a minimum volume of air per 1,000 Btu/h. The exact calculation depends on the type of fuel being burned. For natural gas, the minimum required volume would be approximately 40 cubic feet per 1,000 Btu/h, while for liquid propane, it would be a little less than half-a-gallon (about 2 liters) per 1,000 Btu/h.