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Venting System Assembly
General Information
The Intrepid is approved for installation only with the Dura
Vent components listed on page 14. Follow these and the
vent component instructions exactly.
For U.S. installations: The venting system must conform
with local codes and/or the current National Fuel Gas Code,
ANSI Z223.1/NFPA 54
For Canadian installations: The venting system must
conform to the current CSA B149.1 installation code.
Options
The DuraVent Direct Vent Pro offers a complete line of
component parts for both horizontal and vertical installa-
tion. Many items are offered in decorative black as well
as galvanized finish. The galvanized pipe and fittings may
be used for concealed locations such as attics, or spaces
where corrosion is a factor, such as above the roofline.
Decorative black painted sections are recommended for
use on visible interior runs. Decorative brass trim kits are
available for both Wall Thimbles and Ceiling Support Box-
es. Snorkel Terminations are available for applications
which may require vertical rise on the building exterior.
Planning Your Installation
There are two basic types of Direct Vent Pro installa-
tions:
Horizontal Termination (Figs. 18 and 19)
Vertical Terminations (Fig. 20)
When planning your installation, it will be necessary to
select the proper length of vent pipe for your particular
requirement. For horizontal installations, check these in-
structions to determine the minimum clearance from the
rear of the appliance to the wall. It is also important to note
the wall thickness. Select the amount of vertical rise de-
sired or required, for "vertical-to-horizontal" installations
(verify that it is within the minimum and maximum limits.
Refer to page 8). To determine the length of vent pipe re-
quired for vertical installations, measure the distance from
the appliance flue outlet to the ceiling, the ceiling thick-
ness, the vertical rise in an attic or second story, and allow
for sufficient vent height above the roofline. For multi-sto-
ry applications, firestops are required at each floor/ceiling
level. If an offset is needed in the attic, additional pipe and
elbows will be required.
20306761
Intrepid® Direct Vent - Rear Vent Gas Heater
Figure 18
Zero Clearance Wall Sleeve
Firestop
Round Ceiling Support /
Wall Thimble Cover
Pipe Section
ST973
ST973
simpson rear install
Figure 19
8/07
Pipe Section
90° Elbow
Pipe Section
90° Elbow
ST974
ST974
simpson thru
the wall
8/07
Square Horizontal
Termination
Square Horizontal
Termination Cap
Zero Clearance
Wall Sleeve
Firestop
Round Ceiling
Support / Wall
Thimble Cover
15
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