13
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Note: Convert inches into metric equivalent
measurement, as follows:
Millimeters (mm) = Inches x 25.4
Centimeters (cm) = Inches x 2.54
Meters (M) = Inches x .0254
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Figure 17

Effective Vent Length

Model Effective Length
SV4.5L6 4-1/2"
SV4.5L12 10-1/2"
SV4.5L24 22-1/2"
SV4.5L36 34-1/2"
SV4.5L48 46-1/2"

Table 8

SV4.5CGV-1Termination SV4.5FA ORSV4.5FB FlashingAND SV4.5SCSTORM COLLAR
uSV4.5VF
Firestop/SpacerSV4.5L6/12/24/36/48Vent Sections40’ Max(12.2 M)1" (25.4 mm)MinimumClearance toCombustibles
uWhen using Secure Flex
use Firestop/SpacerSF4.5VF6’ Min(1.8 M)

VERTICAL TERMINATION SYSTEMS (ROOF)

See Figure 17 on Page 13 and Figures 25 through

27 on Pages 16 and 17 and their associated

Vertical Vent Tables which illustrate the various

vertical 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/CSA-B149.1 installation code)

by major building codes. Always consult your

local codes for specific requirements. A general

guide to follow is the Gas Vent Rule (refer to

Figure 5 on Page 6).

Vertical (Straight) Installation

(Figure 17)

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 (see Tables on this page and Page

36 - Vent Sections). 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.