directvented

Directvented refers to a type of gas appliance, most commonly a furnace or water heater, that draws combustion air directly from the outdoors and exhausts combustion byproducts directly to the outdoors. This design is achieved through a sealed combustion chamber. The appliance utilizes a coaxial or parallel vent system. The coaxial system typically consists of two pipes, one inside the other. The inner pipe carries exhaust gases out, while the outer pipe draws fresh air in for combustion. Parallel vent systems use two separate pipes for intake and exhaust. This sealed combustion process prevents the appliance from consuming indoor air for burning fuel, which is a significant safety advantage. It also eliminates the need for a chimney and reduces the risk of backdrafting, where harmful combustion gases could enter the living space. Directvented appliances are often a good choice for homes where traditional venting might be difficult or where indoor air quality is a primary concern. They require specific venting materials that are designed to withstand the temperatures and corrosive nature of the exhaust gases.