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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
17
H
V
Wall Firestop/Spacer
(SV8HF)
Ceiling
Firestop/Spa
ce
r
(SV8BF)
Table C
H Maximum
V Minimum
feet (meter) feet (meter)
3.5
(1.07) 2.5
(0.762)
6.5 (1.98) 3.5 (1.07)
8.5 (2.6) 4.5 (1.37)
10.5 (3.2) 5.5 (1.68)
12.5 (3.8) 6.5 (1.98)
14.5 (4.4) 7.5 (2.3)
16.5 (5.0) 8.5 (2.6)
18.5 (5.6) 9.5 (2.9)
20 (6.0) 10 (3.0)
V + H = 40 feet (12.4 m) Max.
H = 20 ft. (6.2 m) Max.
Venting Components Required for Various Exterior Wall Thick-
nesses, when using Square Termination Kit (SV8HTS)
Vent Components Required Exterior Wall Thickness - inches (mm)
Termination Kit Only 5 to 8-1/2 (127 to 216)
Termination Kit and 6 In. Vent
Section (SV8L6)
9-3/4 to 14 (248 to 356)
Termination Kit and Tele-
scopic Section (SV8LA)
6-3/4 to 15-1/4 (171 to 387)
Termination Kit and Tele-
scopic Section (SV8LA) and 6
in. vent section (SV8L6)
11-1/4 to 19-3/4 (286 to 502)
Table 6
HORIZONTAL VENT FIGURES/TABLES
Note: Two 45 degree elbows may be used in place of one 90 degree
elbow. The same rise to run ratios, as shown in the venting figures for
90 elbows, must be followed if 45 degree elbows are used.
Note: It is very important that the horizontal/inclined run be maintained in
a straight (no dips) and recommended to be in a slightly elevated plane,
in a direction away from the fireplace of 1/4" rise per foot (20 mm per
meter) which is ideal, though rise per foot run ratios that are smaller are
acceptable all the way down to at or near level.
Note: SV8BF (Secure Vent) firestop/spacer must be used anytime vent
pipe passes through a combustible floor or ceiling. SV8HF (Secure
Vent) firestop/spacer must be used anytime vent pipe passes through a
combustible wall.
Figure 28 - Top Vent - ONE 90 DEGREE ELBOW - ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE
See Table 6 as an aid in venting component selection for
a particular range of exterior wall thicknesses.
Square termination (SV8HTS) shown.