Propane - LPG - Liquified Petroleum Gas

Propane is heavier than air. If a leak in a propane fuel system occurs, the gas will have a tendency to sink into any enclosed area and thus poses a risk of explosion and fire. Compressed Natural Gas (CNG) is another gas used as fuel but is lighter than air and thus less risky. Propane is bought and stored in a liquid form (LPG) and thus more fuel energy can usually be stored in the same space than CNG.

Propane is very popular for heating in places where natural gas pipelines are not installed.

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