Lennox Hearth ELITE ELDV-40NM User Manual
Page 21
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.
E
L
B
A
T
D
m
u
m
i
n
i
M
V
m
u
m
i
x
a
M
H
t
e
e
f
)
m
(
t
e
e
f
)
m
(
*
)
1
0
6
.
0
(
4
/
1
3
)
1
9
9
.
0
(
3
)
4
1
9
.
0
(
7
)
4
3
1
.
2
(
4
)
2
2
.
1
(
2
/
1
0
1
)
2
.
3
(
5
)
4
2
5
.
1
(
4
1
)
7
6
2
.
4
(
6
)
9
2
7
.
1
(
2
/
1
7
1
)
3
3
.
5
(
7
)
4
3
1
.
2
(
0
2
)
2
.
6
(
.
x
a
M
)
m
4
.
2
1
(
t
e
e
f
0
4
=
H
+
V
.
x
a
M
)
m
2
.
6
(
t
e
e
f
0
2
=
H
V
H
H1
v
Wall Firestop/Spacer
(SV4.5HF)
v
When using Secure Flex,
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)