What is the difference between Natural Gas and Liquid Propane?
A. You will most likely have natural gas in urban housing and propane in rural housing. Natural gas is lighter than air and is 138,000 BTUs a gallon, while propane is heavier than air (caution: propane will pool up if you have a leak – shut gas off immediately until leak can be fixed) and is 90,000 BTUs per gallon.