Steam boilers require extensive piping and are typically large, so they cannot reasonably be brought to work. However, many commercial buildings rely on steam boilers for heating.
Most steam boilers use burning natural gas or heating oil to generate heat, which is applied to a tank of water. As the water turns to steam, it expands, entering pipes and radiators that heat the air throughout the building. While they are typically a bit less efficient than boilers that pump hot water through pipes, steam boilers generally offer better efficiency than furnaces and other heating devices. Newer boilers of all types generally offer better efficiency than older units, and owners of commercial buildings may find a steam boiler to be the best option for central heating.