Furnaces

Direct-Vent systems mount on an outside wall and have a vent-within-a-vent system to draw in outdoor air to support combustion and
exhaust flue products to the outdoors.  The vent cap installs on the outside wall of the home. Because they do not draw your already-heated room air to support combustion, Direct-Vent systems are among the most efficient of the vented heaters. A Direct-Vent system may be installed as your home’s primary heating system.