Napoleon Fireplaces BGD40-N - Manual (Page 9)

9
W415-0299 / F / 01.16.07
40 FEET
MAXIMUM
34 INCHES
MINIMUM
Use the GD401 periscope kit to locate the air termination
above grade. The periscope must be installed so that when
final grading is completed, the bottom air slot is located a
minimum of 12 inches above grade. The maximum allow-
able vent length depends on the model of fireplace, as
illustrated.
When venting, the horizontal run must be kept to a mini-
mum of 10 inches or a maximum of 20 feet. If a 20 foot
horizontal run is required, the fireplace must have a mini-
mum vertical rise immediately off the fireplace of 57 inches.
FIGURE 3a.
FIGURE 3a
FIGURE 4
FIGURE 3b
When terminating
vertically, the vertical
rise is a minimum 34
inches and a maxi-
mum 40 feet above
the fireplace. FIGURE
3b.
TYPICAL VENT INSTALLATIONS
SPECIAL VENT INSTALLATIONS
PERISCOPE TERMINATION
MINIMUM
*
When installing with no vertical rise, ensure that the
vent pipe does not slope downward.