SuperiorFireplaces.us.com
126718-01N
21
Roof Pitch
Termination Height *
Flat to 6/12
1.0 ft (0.3 m)
6/12 to 7/12
1.25 ft (0.38 m)
7/12 to 8/12
1.5 ft (0.46 m)
8/12 to 9/12
2.0 ft (0.61 m)
9/12 to 10/12
2.5 ft (0.76 m
10/12 to 11/12
3.25 ft (0.99 m)
11/12 to 12/12
4.0 ft (1.22 m)
12/12 to 14/12
5.0 ft (1.52 m)
14/12 to 16/12
6.0 ft (1.83 m)
16/12 to 18/12
7.0 ft (2.13 m)
18/12 to 20/12
7.5 ft (2.29 m)
20/12 to 21/12
8.0 ft (2.44 m)
Figure 24 - Vertical Venting Configuration Using Two 90° Elbows
Figure 24a - Vertical Venting Configuration Using Three 90° Elbows
Figure 23 - Top Vent—Straight
Figure 22 - Termination Heights for Vents above Flat or Sloped
Roofs (NFPA 54 / ANSI Z223.1)—Gas Vent Rule
VENTING INSTALLATION
Continued
Ceiling
firestop/spacer
SV4.5VF
Wall
firestop/
spacer
SV4.5HF**
Ceiling
firestop/
spacer
SV4.5VF*
12
X
Roof pitch is X/12
2 ft
minimum
2 ft minimum
Lowest
discharge
opening
H*
*H = minimum height from roof to
lowest discharge opening of vent
Horizontal overhang
Vertical
wall
Vent
termination
Storm collar
Concentric
vent pipe
Flashing
1” (26 mm) minimum
clearance to combustibles
Vertical termination Configurations
Figure 23, 24 and 24a
show the configurations for vertical
termination.
V1
H
V
H1
90°
Elbow
NOTE:
SV4.5VF firestop/spacer must be used anytime vent pipe pass-
es through a combustible floor or ceiling. SV4.5HF firestop/spacer
must be used anytime vent pipe passes through a combustible wall.
Venting with Two 90° Elbows
Vertical (V
1
)
Horizontal (H)
feet
(meters)
feet
(meters)
5' Min.
(1.524) 10' Max
(3.048)
6' Min.
(1.829) 14' Max
(4.267)
7' Min.
(2.134) 20' Max
(6.096)
20'Min. (6.096) 20' Max
(6.096)
NOTE:
Vertical (V
1
) + Vertical (V
2
) = 20' (6.096 m) Max.
V + H = 40' (12.192 m) Max.
H=20' (6.096 m) Max.
Venting with Three 90° Elbows
Vertical (V)
Horizontal (H + H
1
)
feet
(meters)
feet
(meters)
4' Min.
(1.219)
20' Max
(6.096)
When using Secure Flex
®
, use
ceiling firestop/spacer SF4.5VF.
When using Secure Flex
®
, use wall
firestop/spacer SF4.5VF
*
**
40 ft.
(12.192 m)
maximum
