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QUALIFIED
INSTALLER
Venting Considerations—Vertical Takeoff
Required
clearance
to vertical
pipe is
within
stand-off
space
Venting Considerations—Horizontal Takeoff
26
Framing Requirements
12" pipe section
Fireplace
12" pipe section
2-1/2"
(64 mm)
Fireplace
*
Notes—ALL venting considerations
• Dimensions of venting are based on
using Dura-Vent elbows. Elbow curve
radius dimensions will vary when using
other brands and in general are slightly
bigger.
• Minimum 12 inches vertical pipe section
required within vent system either right
off unit or downstream after horizontal
run. Refer to venting chart on page 29 for
allowable horizontal runs.
• 3 inches to combustibles required above
horizontal pipe. Slope pipe upwards 1/4
inch per foot. 1 inch clearance required
around sides and bottom of horizontal
pipe and around vertical pipe.
• When calculating effective pipe lengths
subtract approximately 1-1/2 inch for
pipe joint - for example, a 12 inches pipe
section will add approximately 10-1/2
inches overall.
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