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VentInG InStaLLatIon
horizontal sections of this vent system
require a minimum of 3" clearances to
combustibles at the top of the flue and 1"
clearance at the sides and bottom until the
flue penetrates the outside wall. a minimum
1" clearance all around the flue is acceptable
at this point of penetration.
If the vertical rise is 7
clearance is needed on top of any horizontal
run.
Vertical sections of this vent system require
a minimum of 1" clearance to combustibles
on all sides of the pipe.
Figure 11 -
Combustible
Clearances for Vent
Pipe
74D3001
1
/
ft. or more, only a 1"
2
A minimum of 3" clearance
to the top is required along
horizontal length until flue
pipe penetrates outside
wall.
FP2338
min. vent clear
3"
1"
1"
12"
Vertical Rise Required
Before Horizontal Run
FP338
DVBL7 Series Gas Fireplace
A minimum 1" clearance
t o
c o m b u s t i b l e s
permitted all around
flue at outside wall
15
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