Filter
Top Products
21
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 32 - Top Vent - TWO 90 DEGREE ELBOWS
See Table 9 on Page 20 as an aid in venting component selection for
a particular range of exterior wall thicknesses.
Example: If 20 feet of (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 horizontal run of 20 feet.
An elbow is acceptable as 1 foot of vertical rise.
Note: Install a second restrictor in any run having more
than 8 ft. of vertical rise.
Typical termination shown.
ELBATD
muminiMVmumixaMH
teef)m(teef)m(
*)106.0(4/13)199.0(
3)419.0(7)431.2(
4)22.1(2/101)2.3(
5)425.1(41)762.4(
6)927.1(2/171)33.5(
7)431.2(02)2.6(
.xaM)m4.21(teef04=H+V
.xaM)m2.6(teef02=H
V
H
H
1
v
Wall Firestop/Spacer
(SV4.5HF)
v
When using SecureFlex,
use Firestop/Spacer
SF4.5HF.
u
Ceiling
Firestop/Spacer
(SV4.5VF)
u
Note - When using
Secure Flex
TM
, use
Firestop/Spacer SF4.5VF.
v
Wall
Firestop/Spacer
(SV4.5HF)
Min. One Foot Vent
Section Required
HORIZONTAL VENT FIGURES / TABLES (CONTINUED)