I don't know anyone who, when talking about heating, says "gas" and means "propane". "gas" is usually shorthand for "natural gas", usually from the grid. If the

I don't know anyone who, when talking about heating, says "gas" and means "propane". "gas" is usually shorthand for "natural gas", usually from the grid. If they were talking about propane, they'd say that. But yeah- in my neck of the woods, anywhere outside the city has a propane tank on the property somewhere.