Direct Vent Pipe Clearance

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.

Direct vent pipe clearance.

48 travis 2016 clearance to the side of any non mechanical supply air inlet. 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. 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 non direct vent applications that is side wall venting only the required clearance is 7 feet.

Because the outer wall of b vent doesn t get all that hot code requires only 1 in. 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. Available pipe sizes lengths. Maintain 3 clearance to combustibles on top.

Single wall vents get very hot requiring a 6 in. The general rule of thumb however is a 1 inch clearance all the way around for vertical vent runs. Vent pipe clearances the following clearances apply to all pipe used with an ortal appliance regardless of which pipe manufacturer is used. Direct vent chimney systems are specialized.

For information on venting gas appliances having draft hoods and other appliances listed to be used with type b gas vent request our type b gas vent. Maintain 1 clearance to combustibles on entire circumference. Of clearance between it and combustibles. Direct vent terminal clearance distances.

For venting direct vent gas appliances listed or certified for use with amerivent direct vent. Nominal 4 id x 6 5 8 od and nominal 5 id x 8 od. A larger and more complete illustration and table of clearance distances is at gas appliance direct vent clearances live link given just above. Clearance distance from gas vent termination cap to any mechanical air supply inlet.

For a gas fireplace exhaust termination cap 3 feet 91cm above if within 10 feet 3m horizontally. 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.