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For Vertical Terminations
install the vent sections:
• Locate and mark the vent centerpoint on the underside
of the roof, and drive a nail through the centerpoint.
• Make the outline of the roof hole around the centerpoint
nail.
• The size of the roof hole framing dimensions depend on the
pitch of the roof. There MUST BE a 1-inch (25.4mm) clear-
ance from the vertical vent pipe to combustible materials.
• Mark the roof hole accordingly.
• Cover the opening of the installed vent pipes.
• Cut and frame the roof hole.
• Use framing lumber the same size as the roof rafters
and install the frame securely. Flashing anchored to the
frame must withstand heavy winds.
• Continue to install concentric vent sections up through
the roof hole (for inside vent installations) or up past the
roof line until you reach the appropriate distance above
the roof (for outside terminations).
WARNING: MAJOR U.S. BUILDING CODES
!
SPECIFY MINIMUM CHIMNEY AND/OR
VENT HEIGHT ABOVE THE ROOF TOP. THESE MIN-
IMUM HEIGHTS ARE NECESSARY IN THE INTER-
EST OF SAFETY. SEE THE FOLLOWING DIAGRAM
FOR MINIMUM HEIGHTS, PROVIDED THE TERMI-
NATION CAP IS AT LEAST TWO (2) FEET FROM A
VERTICAL WALL AND 2-FEET BELOW A HORIZON-
TAL OVERHANG.
NOTE: This also pertains to vertical vent systems in-
stalled on the outside of the building.
To seal the roof hole, and to divert rain and snow from the
vent system:
• Attach a flashing to the roof using nails, and use a non-
hardening mastic around the edges of the flashing base
where it meets the roof.
• Attach a storm collar over the flashing joint to form a
water-tight seal. Place non-hardening mastic around the
joint, between the storm collar and the vertical pipe.
• Slide the termination cap over the end of the vent pipe
and rotate the pipe clockwise 1/4 turn.
- To locate the vent and
Heat & Glo • Gateway • 288-900 Rev. S • 3/06
2 FT.
2 FT. MIN.
MIN.
LOWEST
DISCHARGE
OPENING
TERMINATION
CAP
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING
Roof Pitch
flat to 6/12
over 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
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
Figure 3.23 Minimum Height from Roof to
Lowest Discharge Opening
Step 5. Positioning, Leveling, and
Securing the Fireplace
The diagram below shows how to properly position, level,
and secure the fireplace.
• Place the fireplace into position (see Figure 3.24).
• Level the fireplace from side to side and from front to
back.
• Shim the fireplace with non-combustible material, such
as sheet metal, as necessary.
• Secure the fireplace to the framing using nails or screws
through the nailing tabs.
NAILING TABS
(BOTH SIDES)
Figure 3.24
Proper Positioning, Leveling,
and Securing of a Fireplace
HORIZONTAL
OVERHANG
VERTICAL
WALL
X
12
ROOF PITCH
IS X/ 12
H (min.) ft.
1.0
1.25
1.5
2.0
2.5
3.25
4.0
5.0
6.0
7.0
7.5
8.0
23
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