If you want to do casting at home, you’ll need a way to melt metal ... of the furnace is built out of a water heater tank which has been lined with a special cement that refracts heat.

Burners: Small outlets where gas emits within the furnace and is ignited ... off gas flow if no heat is detected. Heat exchanger: A series of thin-walled metal tubes that keep the combustion ...

Electric furnaces are heating appliances consisting of an enclosed metal box containing an electric ... is fed into the heating elements. Plenum: A small air chamber area in the furnace that ...