What is a Furnace?

A furnace is a device or appliance used for heating spaces or materials to a high temperature. It is commonly used for various purposes, including heating buildings, industrial processes, and metallurgical operations. Furnaces can be powered by various energy sources such as natural gas, oil, electricity, or solid fuels.

In the context of residential heating, a furnace is typically part of a central heating system. It heats air, and the heated air is then distributed throughout the building via a system of ducts and vents. There are different types of furnaces, including gas furnaces, oil furnaces, and electric furnaces, each with its own advantages and considerations.