Table of Contents
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LENNOX HEARTH PRODUCTS • ELITE LINEAR VIEW DIRECT-VENT GAS FIREPLACE (MODELS LDV42, LDV54) • INSTALLATION INSTRUCTIONS
VENTINg INSTALLATION
(CONTINUED)
VENT SECTION LENgThS
(NOMINAL AND EffECTIVE/NET)
• Plan vent lengths to prevent joints at the
intersection of ceiling or roof joists.
• Vent length combinations and straight vent
effective lengths are listed in Figure 14-2.
TELESCOPIC VENT SECTION
A telescopic vent section may be used when
installing in tight spaces or when a vent run that
is made up of fixed-length sections develops a
joint in a undesirable location or will not build
up to the required length.
The effective length of the Telescopic Vent
Section ranges from 1-1/2" (38 mm) to 7-1/2"
(191 mm).
The Telescopic Vent Section is fitted with a
dimpled end (identical to a normal vent section
component) and a plain end with 3 pilot holes.
Slip the plain end over the locking incline chan-
nel end of a standard vent component the re-
quired distance, and secure with three screws.
ELBOWS
• When planning vent runs, make allowances
for elbows.
• A 90° elbow may NOT be attached directly
to the appliance collar. A minimum of 6"
pipe must be used between the fireplace
collar and a 90° elbow.
• Two 45° elbows may be used in place of one
90° elbow (use the same rise-to-run ratios
as shown for a 90° elbow).
• An elbow is acceptable as 1 foot of vertical
rise.
• Each elbow features a 360° swivel joint
(Figure 14-1), which allows it to be rotated
around the center axis of the dimpled end,
to align with the direction of the next vent
run section.
Note: Rotate elbows in a CLOCkWISE
direction only, to avoid unlocking the
previously connected vent section.
4-13/16"
(122 mm)
360° Swivel joint
360° Swivel joint
(45° Elbow)
(90° Elbow)
Figure 14-1: Elbows
14
V
E
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VENT SECTION LENgThS
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5 .
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1
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5 .
1
8 .
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1 3
5 .
2
6 .
5 2
0
4 3
5 .
2
8 .
5 7
0
7 3
5 .
3
1 .
5 2
1
3 4
5 .
3
6 .
5 2
0
5 4
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0
6 4
5 .
3
8 .
5 7
0
1 5
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5 2
1
5 5
5 .
4
6 .
5 2
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5 .
5
6 .
5 2
0
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0
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5 .
6
1 .
5 2
1
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6 .
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5 .
7
6 .
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8
1 .
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1
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8
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9
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8 .
5 7
1
1
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1
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1
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5 .
1 1
6 .
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0
1
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1 1
8 .
5 7
1
1
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1
1
4 5
5 .
2 1
8 .
5 7
1
1
0 6
5 .
3 1
3 .
5 7
0
1
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5 .
4 1
3 .
5 7
0
1
7 7
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5 7
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1
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5 .
0
1
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3 .
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2
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5 2
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8-1/8"
2
9 7
2
. 3
5 2
0
(206 mm)
2
0 8
5 .
3 2
3 .
5 7
1
METRIC CONVERSION:
2
9 8
5 .
4 2
1 .
5 2
0
Inches x 25.4 = mm.
3
1 0
5 .
5 2
1 .
5 2
0
Inches x 2.54 = cm.
3
0 1
5 .
5 2
8 .
5 7
0
Inches x 0.0254 = m.
3
5 2
5 .
7 2
1 .
5 2
0
Figure 14-2: Straight Vent Section Lengths
3
0 3
7 2
5 .
1
3
5 4
2
. 8
5 7
0
NOTE: DIAGRAMS AND ILLUSTRATIONS ARE REPRESENTATIVE AND ARE NOT DRAWN TO SCALE.
3
9 4
5 .
9 2
1 .
5 2
1
3
2 7
1 3
0
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VENT SECTION LENgThS
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1 -
2 /
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1 -
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2
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5 2
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3 .
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1
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6 .
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4
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5 .
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3 .
5 7
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4
4
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5 .
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5 .
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3 .
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5 7
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5
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5 .
5 .
9 4
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6 .
3 .
5 7
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5
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5 .
5 .
9 4
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1 .
3 .
5 7
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5
6
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5 1
5 .
9 4
5
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6 .
5 2
5 2
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5 .
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3 .
5 7
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6
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5 .
2 5
1 .
5 2
0
2
0
6
6
1 3
5 1
5 .
2 5
5
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6 .
5 2
5 2
0
1
0
1
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6
6
7 3
5 2
5 .
5 .
3 5
2 5
1 .
1 .
5 2
5 2
0
0
2
1
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6
6
1 3
1 5
5 .
2 5
5
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6 .
5 2
5 2
0
1
0
0
1
0
6
6
5 5
7 3
5 .
5 .
3 5
4 5
6 .
1 .
5 2
5 2
0
1
1
0
1
0
6
6
1 5
2 7
5
. 4
6 5
5 2
0
0
2
0
0
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6
6
5 5
8 7
5 .
4 5
6 5
6 .
5 .
5 2
1
1
0
0
1
0
6
6
8 8
2 7
5 .
7 5
6 5
3 .
5 7
0
1
2
1
1
0
6
6
7 9
8 7
5 .
8 5
6 5
1 .
5 .
5 2
1
0
0
0
0
1
6
7
8 8
2 0
5 .
7 5
8 5
3 .
5 .
5 7
1
1
0
1
1
0
7
6
7 9
2 1
5 .
5 .
8 5
9 5
3 .
1 .
5 7
5 2
1
0
1
0
0
0
7
7
2 0
0 2
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5 .
0
1
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7
2 1
5 .
9 5
3 .
5 7
1
1
0
STRAIghT VENT SECTION
7
0 2
0 6
0
0
1
EffECTIVE (NET) LENgThS*
Description
Effective Length
6 in (152 mm) Vent Section
4.5 in (114 mm)
12 in (305 mm) Vent Section
10.5 in (267 mm)
24 in (610 mm) Vent Section
22.5 in (572 mm)
36 in (914 mm) Vent Section
34.5 in (876 mm)
48 in (1219 mm) Vent Section 46.5 in (1181 mm)
*See "Installation Accessories" at the back of this
manual for all approved venting components.
C
H
A
R
T
T
6 3
8 4
O
C
H
A
R
T
T
A
4 3
1 -
2 /
6 4
1 -
2 /
T
L
6 3
8 4
O
T
S
e
t c
o i
s n
Q
A
T
4 3
1 -
2 /
6 4
1 -
2 /
L
Y
S
e
t c
o i
s n
Q
8
0
8
T
0
6
Y
6
8
8
0
0
8
9
0
0
6
6
6
7
8
0
9
0
6
7
0
9
6
0
9
7
0
0
6
7
7
7
0
9
0
7
9
8
0 1
0
0
7
0 1
7
0 1
0
7
0
1 1
8
0 1
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8
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8
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1 1
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0
1 1
1 1
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9
8
8
9
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0
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0
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1 1
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9
1 1
9
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0
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0 1
1 1
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2 1
0
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1 1
1
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1
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2
2 1
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2 1
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5 1
3 1
0
0
2 1
2 1
2 1
3 1
0
0
2 1
2 1
3 1
4 1
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2 1
2 1
3 1
3 1
2
0
2 1
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4 1
5 1
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2 1
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3 1
5 1
0
2
3 1
0 1
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0
0
3 1
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0
3 1
3 1
0
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4 1
4 1
4 1
6 1
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0
4 1
4 1
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6 1
0
0
4 1
4 1
6 1
7 1
0
0
5 1
4 1
6 1
5 1
0
0
4 1
5 1
7 1
6 1
0
0
5 1
5 1
5 1
7 1
0
0
5 1
5 1
6 1
6 1
0
5 1
7 1
0
5 1
6 1
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