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B-Vent Specialty Gas Fireplaces
VERTICAL TERMINATION
Major building codes specify a minimum vent height above the rooftop depending on the pitch of the
roof. Refer to Figure 8 for minimum heights, provided the termination cap is at least 8' from a vertical
wall and 2' below a horizontal overhang. Trees, buildings, adjoining roof lines and adverse wind condi-
tions may require taller chimneys than what is shown.
Listed Vertical
Termination
Cap
Listed Gas Vent
NOTE: Vertical termination must be
at least 8' from vertical wall.
LOCATE AND INSTALL VERTICAL TERMINATION
NOTE: When working on the foor, cover the opening of the installed vent pipe below to prevent debris
falling in.
1. Locate and mark the vent center point on the underside of the roof, and drive a nail trough the center
joint.
2. The size of the roof hole framing dimensions depends on the pitch of the roof.
3. Cut and frame the roof hole.
4. Continue to install vent sections through the roof hole until reaching the appropriate distance above
the roof.
5. Attach a flashing to the roof using nails, and use a non-hardening mastic around the edges of the
flashing base when it meets the roof.
6. Attach a storm collar over the flashing joint to form a watertight seal. Place non-hardening mastic
around the joint, between the storm collar and the vertical pipe.
7. Attach termination per pipe manufacturer's instructions.
14
Lowest Discharge
Opening
H
X
12
H (Min) - Minimum
Height from Roof to Low-
est Discharge Opening
FP1022
Figure 8 -
Minimum Vent Height for Various Roof Pitches
FP1022
Typical Straight Up Installation
1/26/00 djt
Flat to 6/12
6/12 to 7/12
Over 7/12 to 8/12
Over 8/12 to 9/12
Over 9/12 to 10/12
Over 10/12 to 11/12
Roof Pitch is x/12
Over 11/12 to 12/12
Over 12/12 to 14/12
Over 14/12 to 16/12
Over 16/12 to 18/12
Over 18/12 to 20/12
Over 20/12 to 21/12
VENT INSTALLATION
Roof Pitch
H Min. (ft)
1'
1'3"
1'6"
2'
2'6"
3'3"
4'
5'
6'
7'
7'6"
8'
53D9009
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