Filter
Top Products
18
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
H1
V
V1
H
V
H
1
H
V
1
u
Ceiling
Firestop / Spacer
(SV4.5VF)
u
Ceiling
Firestop / Spacer
(SV4.5VF)
v
Wall Firestop/
Spacer (SV4.5HF)
v
Wall Firestop/
Spacer (SV4.5HF)
u
Ceiling
Firestop / Spacer
(SV4.5VF)
Example: If 20 feet total (H+H
1
)
horizontal vent run is needed,
then 4 feet minimum of (V) verti-
cal vent will be required.
This table shows a 1(V) to 5(H)
ratio. For every 1 foot of (V)
vertical, you are allowed 5 feet
of (H+H
1
) horizontal run up to
a maximum total horizontal run
of 20 feet.
An elbow is acceptable as 1 foot
of vertical rise except where
an elbow is the only vertical
component in the system. See
Figure 38.
Table D
H +
H
1
Maximum
V Minimum
feet (meter) feet (meter)
5 (1.524) Elbow Only
5 (1.524) 1 (0.305)
10 (3.048) 2 (0.610)
15 (4.572) 3 (0.914)
20 (6.096) 4 (1.219)
H + H
1
= 20 feet (6.096 m) Max.
V + V
1
+ H + H
1
= 40 ft. (12.192 m) Max.
Table C
H
+H
1
Maximum H
Maximum V Minimum
feet (meter) feet (meter) feet (meter)
5 (1.524) 2 (0.610) 1 (0.305)
10 (3.048) 4 (1.219) 2 (0.610)
15 (4.572) 6 (1.829) 3 (0.914)
20 (6.096) 8 (2.438) 4 (1.219)
V + V
1
+ H + H
1
= 40 feet (12.2 m) Max
H = 8 feet (2.438 meters) Max.
H + H
1
= 20 feet (6.096 meters) Max.
Example: If 20 feet total (H+H
1
) horizontal vent run is needed,
then 4 feet minimum of (V) vertical vent will be required.
This table shows a 1(V) to 5(H) ratio. For every 1 foot of (V)
vertical, you are allowed 5 feet of (H+H
1
) horizontal run up to a
maximum total horizontal run of 20 feet.
u When using Secure Flex, use Firestop / Spacer SF4.5VF
v When using Secure Flex, use Firestop / Spacer SF4.5HF
u When using Secure Flex, use Firestop / Spacer SF4.5VF
v When using Secure Flex, use Firestop / Spacer SF4.5HF
Figure 32 - Rear Vent - THREE ELBOWS
Figure 33 - Top Vent - THREE ELBOWS
HORIZONTAL (OUTSIDE WALL)
TERMINATION SYSTEM
Figure 32 (Page 19), and Figures 35 to 40 on
Pages 21 to 23 and their associated Horizontal
Vent Table which illustrate the various horizontal
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 Horizontal
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 of these horizontal vent systems terminate
through an outside wall. Building Codes limit or
prohibit terminating in specific areas. See Fig-
ures 5 and 6 on Pages 6 and 7 for location
guidelines.
Secure Vent SV4.5 direct-vent system compo-
nents are unitized concentric pipe components
featuring positive twist lock connection, (refer
to Figure 21 on Page 14). All of the appli-
ances covered in this document are fitted with
collars having locking inclined channels. The
dimpled end of the vent components fit over
the appliance collar to create the positive twist
lock connection.
A. Plan the vent run -
Analyze the vent routing and determine the
types and quantities of 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. It is
recommended that you plan the vent lengths
so that a joint does not occur at the intersection
of ceiling or roof joists. Make allowances for
elbows as indicated in Figure 25 (Page 15).
Maintain a minimum 1" (25 mm) clearance
to combustibles on the vertical sections.
Clearances for the horizontal runs are; 3" (76
mm) on top, 1" (25 mm) on sides, and 1" (25
mm) at the bottom.
VERTICAL VENT FIGURES/TABLES (CONTINUED)