Heating Choice is a term used to describe the various options available for heating a home or other space. The three most common choices are OIL, STEAM, and GAS. OIL is a liquid fuel that is burned to produce heat, STEAM is produced by boiling water and is used to power radiators, and GAS is a combustible GAS that is burned to produce heat. All three of these options are viable choices for heating a home or other space.