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Venting Considerations—Vertical Takeoff
(25.4 mm)
Required
clearance
to vertical
pipe affects
cavity depth
Venting Considerations—Horizontal Takeoff
Framing Requirements
12" pipe section
Min 1"
Fireplace -
Left Side View
12" pipe section
1/2"
(13 mm)
beyond
stand-off
Fireplace -
Left side view
*
Notes—ALL venting considerations
• Dimensions of venting are based on
using Dura-Vent elbows. Elbow curve
radius dimensions will vary when using
other brands. In general, other brands
have slightly bigger radius.
• 3 inches clearance to combustibles
required above horizontal pipe. Slope
horizontal 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.
QUALIFIED
INSTALLER
31
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