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VERTICAL TERMINATION SYSTEMS (ROOF)
Figure 17, and Figures 27 through 31 on
pages 13 and 14 and their associated
Vertical Vent Tables illustrate the various verti-
cal venting configurations that are possible for
use with these appliances. Secure Vent pipe
applications are shown in these figures; Secure
Flex pipe may also be used. A Vertical Vent
Table summarizes each system's minimum
and maximum vertical and horizontal length
values that can be used to design and install the
vent components in a variety of applications.
Both these vertical vent systems terminate
through the roof. The minimum vent height
above the roof and/or adjacent walls is speci-
fied in ANSI Z223.1-(latest edition) (In Canada,
the current CAN-1 B149 installation code) by
major building codes. Always consult your
local codes for specific requirements. A gen-
eral guide to follow is the Gas Vent Rule (refer
to Figure 4 on page 5).
Vertical (Straight) Installation
Determine the number of straight vent sections
required. 4 " (114 mm), 10 " (267 mm), 22
" (572 mm), 34 " (876 mm) and 46 " (1181
mm) net section lengths are available. Plan the
vent lengths so that a joint does not occur at the
intersection of ceiling or roof joists. Refer to
the Vent Section Length Chart.
Figure 17
10
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