NOTE: DIAGRAMS AND ILLUSTRATIONS ARE REPRESENTATIVE AND ARE NOT DRAWN TO SCALE.
19
Figure 19-3: Installing Storm Collar
Storm
Collar
Storm
Collar
flashing
Figure 19-4: Attaching Vertical
Termination
3. Install vertical termination.
Extend the vent sections to the height shown
in “
Vertical Vent Termination Clearances
”
(
Figure 19-2
).
The vertical termination (
Figure 19-4
) installs
in the same manner as the other vent sections
(see “
Attaching Secure Vent™ Components
”
on
Page 13
).
• If the vent system extends more than
5 feet (1.5 meters) above the roof flashing,
stabilizers are
required
(not provided).
• Additional screws may be used at section
joints for added stability.
• Guide wires may be attached to the joint for
addi tional support on multiple joint configu-
rations.
INSTALLINg VERTICAL VENT
TERMINATION
1. Install roof flashing.
a. After framing the roof opening (
Page 9
),
extend vent sections through roof struc-
ture.
b. Install roof flashing over the vent section
(
Figure 19-3
), and position so the vent
column rises vertically (use a carpenter’s
level) .
c. Nail along the perimeter to secure the
flashing, or adjust roofing to overlap flash-
ing edges at top and sides only. Trim where
necessary.
d. Seal top and both sides of flashing with
waterproof caulking.
2. Install storm collar.
Note: Refer to "Vertical Vent Termination
Clearances" on previous page.
Install the storm collar (supplied with the
flashing) over the vent/flashing joint (see
Figure 19-3
):
a. Loosen the screw on the storm collar, and
slide the collar down until it meets the top
of the flashing.
b. Tighten the adjusting screw.
c. Apply non-combustible caulking (silicone
caulking is acceptable) around entire cir-
cumference to ensure a water-tight seal.
LENNOX HEARTH PRODUCTS • ELITE LINEAR VIEW DIRECT-VENT GAS FIREPLACE (MODELS LDV42, LDV54) • INSTALLATION INSTRUCTIONS
Figure 19-1: Clearance for Multiple
Vertical Vent Terminations
Min. 12"
(305 mm)
12
X
Roof Pitch is X/12
2 FT
MIN.
2 FT MIN.
Lowest
Discharge
Opening
H*
*H = MINIMUM HEIGHT FROM ROOF TO
LOWEST DISCHARGE OPENING OF VENT
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
Horizontal Overhang
Vertical
Wall
Vent
Termination
Storm Collar
Concentric
Vent Pipe
Flashing
1 inch (25.4 mm) Minimum
Clearance to Combustibles
Figure 19-2: Termination Heights for Vertical Vents
above Flat or Sloped Roofs
Vent/air Intake Termination Clearances
Above the high Side of an Angled Roof
(Ref. NfPA 54 / ANSI Z223.1)
Roof Pitch
h*
feet
Meters
Flat to 6/12
1.0
0.3
6/12 to 7/12
1.25
0.38
7/12 to 8/12
1.5
0.46
8/12 to 9/12
2.0
0.61
9/12 to 10/12
2.5
0.76
10/12 to 11/12
3.25
0.99
11/12 to 12/12
4.0
1.22
12/12 to 14/12
5.0
1.52
14/12 to 16/12
6.0
1.83
16/12 to 18/12
7.0
2.13
18/12 to 20/12
7.5
2.29
20/12 to 21/12
8.0
2.44
VERTICAL VENT TERMINATION
CLEARANCES
• For vertical (roof) termination, the minimum
vent height above the roof and/or adjacent
walls is specified in ANSI Z223.1, latest
edition (in Canada, the current CAN/CSA-
B149.1 installation code) and by major
building codes. Always consult your local
codes for specific requirements. A general
guide to follow is the Gas Vent Rule.
• Terminate multiple vertical vents according
to the installation codes listed above. Also
see
Figure 19-1
.
• Terminate single vertical vent caps relative
to other existing building components, as
shown in
Figure 19-2
.
VERTICAL TERMINATION SySTEMS
(CONTINUED)
