Two pipe system, uses outside air for combustion and exhausts to the outside. Does not require vertical roof penetration, but can be installed vertically.
a furnace or boiler design where all the air for combustion is taken from the outdoors and all exhaust products are released to the outdoors, also known as sealed combustion. Direct Vent is also known as balanced flue venting in oil furnaces and boilers.
Method of venting appliance whereby all air for combustion is derived directly from the outside atmosphere and all flue gases are discharged directly to the outside atmosphere.
A system that pulls outside air for combustion and vents combustion gases directly outside without using a chimney.
a boiler design where all the air for combustion is taken from the outside atmosphere and all exhaust products are released to the outside atmosphere, also known as sealed combustion.
An appliance that draws combustion air from outdoors and exhausts it's combustion products to the outdoors eliminating the need for a standard chimney system. A glass panel in direct vent units is critical to keeping the combustion system sealed from the home, maintaining high efficiency and indoor air quality.
System used with an indoor heat source where intake air and combustion air are vented to the outside atmosphere.
A sealed combustion system where all combustion air is supplied from the building exterior, and all flue gases are returned to the outside. No inside air is used for combustion. Often consists of a two-part co-axial pipe, one fitting inside the other. The incoming combustion air enters through an outer pipe, and the exhaust gases exit through the inner pipe. In some cases (like fireplace insert applications through a fireplace damper) co-linear pipes, meaning side-by-side, are used.
