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VERTICAL VENT FIGURES/TABLES
(continued)
H
Maximum
+H
1
(meters)
feet
(1.524)
5
(3.048)
10
(4.572)
15
(6.096)
20
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 of (H) 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) horizontal run,
up to a maximum horizontal run of 20 feet.
Note: Install the U-shaped vent restrictor in any vent run
f i r e - p a r t s . c o m
with more than 8 ft of vertical rise (See Page 13).
Figure 32: Rear Vent—three elbows
TABLE D
H +
Maximum
H
1
(meters)
feet
(1.524)
5
(1.524)
5
(3.048)
10
(4.572)
15
(6.096)
20
H + H
= 20 feet (6.096 m) Max.
1
V + V
+ H + H
1
1
Example: If 20 feet of (H) 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) horizontal run, up to a
maximum 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 36.
Note: Install the U-shaped vent restrictor in any vent run with
more than 8 ft of vertical rise (See Page 13).
Figure 33: Top Vent—three elbows
18
SUPERIOR
• DIRECT-VENT GAS FIREPLACES (SDV35-N-2) • INSTALLATION INSTRUCTIONS
®
TABLE C
H Maximum
V Minimum
(meters)
(meters)
feet
feet
(0.610)
(0.305)
2
1
(1.219)
(0.610)
4
2
(1.829)
(0.914)
6
3
(2.438)
(1.219)
8
4
V Minimum
(meters)
feet
Elbow Only
(0.305)
1
(0.610)
2
(0.914)
3
(1.219)
4
= 40 ft. (12.192 m) Max.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
H1
Ceiling
Firestop/Spacer
SV4.5VF*
Wall
Firestop/Spacer
SV4.5HF**
V1
V
Ceiling
Firestop/Spacer
V 1
SV4.5VF*
H 1
*When using Secure Flex, use
Ceiling Firestop/Spacer SF4.5VF.
**When using Secure Flex, use
Wall Firestop/Spacer SF4.5HF.
*When using Secure Flex
®
Ceiling Firestop/Spacer SF4.5VF.
**When using Secure Flex, use
Wall Firestop/Spacer SF4.5HF.
Ceiling
Firestop/Spacer
SV4.5VF*
H
Wall
Firestop/Spacer
SV4.5HF**
H
, use
V
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