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LENNOX HEARTH PRODUCTS • RHAPSODY™ LINEAR DIRECT-VENT GAS FIREPLACES (MODELS RHAP42N & RHAP54N) • INSTALLATION INSTRUCTIONS
VERTICAL TERMINATION SySTEMS
(CONTINUEd)
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/CGA-
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 31.
• Terminate single vertical vent caps relative
to other existing building components, as
shown in Figure 32.
Min. 12"
(305 mm)
Figure 31: Clearance for Multiple
Vertical Vent Terminations
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 33), 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.
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
Horizontal Overhang
2 FT
MIN.
2 FT MIN.
Lowest
Discharge
Vent
Opening
Termination
H*
Storm Collar
Flashing
1 inch (25.4 mm) Minimum
Clearance to Combustibles
Concentric
*H = MINIMUM HEIGHT FROM ROOF TO
Vent Pipe
LOWEST DISCHARGE OPENING OF VENT
Figure 32: Termination Heights for Vertical Vents
above Flat or Sloped Roofs
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 33):
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.
flashing
Figure 33: Installing Storm Collar
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Vent/air Intake Termination Clearances
Above the High Side of an Angled Roof
Vertical
Wall
Roof Pitch
Flat to 6/12
6/12 to 7/12
7/12 to 8/12
8/12 to 9/12
X
12
9/12 to 10/12
Roof Pitch is X/12
10/12 to 11/12
11/12 to 12/12
12/12 to 14/12
14/12 to 16/12
16/12 to 18/12
18/12 to 20/12
20/12 to 21/12
3. Install vertical termination.
Extend the vent sections to the height shown
in "Vertical Vent Termination Clearances"
on Page 19.
The vertical termination (Figure 34) installs in
the same manner as the other vent sections
(see "Attaching Secure Vent
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.
Storm
Storm
Collar
Collar
Figure 34: Attaching Vertical
Termination
(Ref. NfPA 54 / ANSI Z223.1)
H*
feet
Meters
1.0
0.3
1.25
0.38
1.5
0.46
2.0
0.61
2.5
0.76
3.25
0.99
4.0
1.22
5.0
1.52
6.0
1.83
7.0
2.13
7.5
2.29
8.0
2.44
®
Components"
19
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