Direct Vent Pipe Clearance

A larger and more complete illustration and table of clearance distances is at gas appliance direct vent clearances live link given just above.

Direct vent pipe clearance.

Direct vent chimney systems are specialized. Single wall vents get very hot requiring a 6 in. Available pipe sizes lengths. Of clearance between it and combustibles.

The vent terminal shall be at least 12 inches below 12 inches horizontally from or 12 inches above any door window or gravity air inlet into a building. For venting direct vent gas appliances listed or certified for use with amerivent direct vent. Maintain 1 clearance to combustibles on bottom. Nominal 4 id x 6 5 8 od and nominal 5 id x 8 od.

36 travis 2016 clearance to each side of center line extended above the gas meter regulator assembly. 48 travis 2016 clearance to the side of any non mechanical supply air inlet. Maintain 3 clearance to combustibles on top. Distance from the exhaust vent at the exterior wall to building features such as gas meter outlet windows doors balconies building corners clearance over a driveway or paved sidwewalk.

Clearance distance from gas vent termination cap to any mechanical air supply inlet. In an attempt to maximize finished floor space when boxing off the water heater from the rest of the room people often don t leave enough clearance between the new wall framing and the vent pipes. Vent pipe clearances the following clearances apply to all pipe used with an ortal appliance regardless of which pipe manufacturer is used. Maintain 1 clearance to combustibles on entire circumference.

In direct vent applications this clearance distance must be in compliance with local building codes the requirements of the fuel gas supplier for the heating appliance in use and the appliance manufacturer s instructions. Direct vent terminal clearance distances. And if running the pipe horizontally it must maintain a 3 inch clearance for the top half of the pipe and a 1 inch clearance for the bottom half of the pipe. If you are using a b vent typically a double walled air insulated vent for gas appliances typically you ll see a fire clearance stamped right into the metal of the chimney stating 1 inch minimum clearance to combustibles as you ll see in this photo.

For a gas fireplace exhaust termination cap 3 feet 91cm above if within 10 feet 3m horizontally. For non direct vent applications that is side wall venting only the required clearance is 7 feet.