Quadra-Fire • TOPAZ-MBK-IPI, TOPAZ-D-PMH-IPI, TOPAZ-D-MBK-IPI, TOPAZ-D-CSB-IPI Installation Manual • 2341-980_R10 • 11/15
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G. Vent Diagrams
To replace the first 90º starter elbow with two 45º elbows,
refer to Figure 4.7. All other 90º elbows can be replaced
with two 45º elbows.
General Rules:
• SUBTRACT 3 ft. from the total H measurement for each
90º elbow installed horizontally.
• SUBTRACT 1 ft. from the total H measurement for each
45º elbow installed horizontally.
• A maximum of three 90º elbows (or six 45º elbows) may
be used in any vent configuration. Some elbows may be
installed horizontally. See specific vent diagrams.
• When penetrating a combustible wall, a wall shield firestop
must be installed.
• When penetrating a combustible ceiling, a ceiling firestop
must be installed.
Top Vent—Horizontal Termination—Two 45º Elbows
Installation requirements to replace the first 90º elbow
with two 45º elbows:
4 ft min.
(1.22 m)
Figure 4.7
F. Venting Guidelines for Horizontal Runs
Figure 4.6
Max Horizontal Run
20 ft. (6.1 m) when vertical
rise is 10 ft (3m)
Rear Vent with Vertical
Rise
Min of 3 ft vertical (914 mm)
must be used prior to any
horizontal run. Derating ori
-
fice must be used.
See Figure 4.6.
Horizontal Run requires a non-combustible support
every 5 ft (1.5 m), i.e., plumbing tape
A vent run off the top of the appliance must have a
minimum vertical of 2 feet.
CL
3 FT. MIN.
REAR VENT
CAUTION
!
VENTING STRAIGHT OUT THE REAR WITHOUT
VERTICAL RISE IS PROHIBITED
All rear vent applications will require the use of a derating
orifice, included in the Rear Vent Kit