Along with the water heater, the furnace is your most important home appliance. Here's a guide to understanding yours and giving it the TLC it needs.

The chamber of the furnace is built out of a water heater tank which has been lined with a special cement that refracts heat. The furnace is heated by a Babington burner. This type of burner works ...

Powerful, free radiating coiled wire elements are held firmly in the sides and roof of the chamber, which are constructed from rigidised low thermal mass insulation. A hard, dust-free, ceramic hearth ...

Simple: Seal the combustion chamber. But that raises another question ... which drips into a drainage system, this type of furnace doesn’t come with a conventional metal exhaust vent.