For venting direct vent gas appliances listed or certified for use with amerivent direct vent.
Direct vent pipe clearance.
Clearance distance from gas vent termination cap to any mechanical air supply inlet.
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.
48 travis 2016 clearance to the side of any non mechanical supply air inlet.
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.
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 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.
Available pipe sizes lengths.
36 travis 2016 clearance to each side of center line extended above the gas meter regulator assembly.
Direct vent terminal clearance distances.
Of clearance between it and combustibles.
Nominal 4 id x 6 5 8 od and nominal 5 id x 8 od.
The general rule of thumb however is a 1 inch clearance all the way around for vertical vent runs.
For a gas fireplace exhaust termination cap 3 feet 91cm above if within 10 feet 3m horizontally.
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.
Maintain 3 clearance to combustibles on top.
Single wall vents get very hot requiring a 6 in.
Vent pipe clearances the following clearances apply to all pipe used with an ortal appliance regardless of which pipe manufacturer is used.
For non direct vent applications that is side wall venting only the required clearance is 7 feet.
Maintain 1 clearance to combustibles on bottom.
Direct vent chimney systems are specialized.
Because the outer wall of b vent doesn t get all that hot code requires only 1 in.
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.
