Lennox Hearth ELITE ELDV-40NM User Manual
Page 22
22
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
V
H
H1
V1
Wall Firestop/Spacer
(SV4.5HF)
Ceiling
Firestop/Spacer
(SV4.5VF)
When using Secure Flex
TM,
use Firestop/Spacer
SF4.5VF.
When using Secure
Flex, use Firestop/Spacer
SF4.5HF.
Wall Firestop/Spacer
(SV4.5HF)
v
v
u
Min. One Foot Vent
Section Required
v
u
E
L
B
A
T
E
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
Example: If 20 feet total (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.
See Table 9 on Page 20 as an aid in venting component selection
for a particular range of exterior wall thicknesses.
Figure 33
- Top Vent - THREE 90 DEGREE ELBOWS
HORIZONTAL VENT FIGURES / TABLES (CONTINUED)
Typical termination shown.