Figure 16, Effective vent length, Table 7 – Lennox Hearth ADAGIO-EN User Manual
Page 14
14
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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VENT SECTION LENGTH CHART
Nominal Section
Length (inches)
6
12
24
36
48
Net Section
Length (inches)
4 ½
10 ½
22 ½
34 ½
46 ½
Height of Vent
Number of Vent Sections
*inches
feet
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VENT SECTION LENGTH CHART
Nominal
Section Length
(inches)
6
12
24
36
48
Net Section
Length (inches)
4 ½
10 ½
22 ½
34 ½ 46 ½
Height of Vent
Number of Vent Sections
*inches
feet
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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
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 7
Figure 16
SV4.5CGV-1
Termination
SV4.5 F A OR
SV4.5FB Flashing
AND SV4.5SC
STORM COLLAR
SV4.5VF
Firestop/Spacer
SV4.5L6/12/24/36/48
V ent Sections
40' Max.
(12.2 M)
6' Min.
(1.8 M)
1" (25.4 mm)
Minimum
Clearance to
Combustibles
When
using Secure Flex,
use Firestop/Spacer
SF4.5VF
VERTICAL TERMINATION SYSTEMS (ROOF)
See Figures 16, and 24 through 26 on
Pages 14 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 ap-
plications 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 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 16)
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
32 - 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.