10 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 17

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 ¹⁄₂" (114 mm), 10 ¹⁄₂" (267 mm), 22

¹⁄₂" (572 mm), 34 ¹⁄₂" (876 mm) and 46 ¹⁄₂" (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.

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SV4.5CGV-1Termination SV4.5FA ORSV4.5FB FlashingAND SV4.5SCSTORM COLLAR*SV4.5BFFirestop/SpacerSV4.5L6/12/24/36/48Vent Sections40' Max(12.2 M)1" (25.4 mm)MinimumClearance toCombustibles*When using Secure Flex,use Firestop/SpacerSF4.5BF