Hearth and Home Technologies Everest - Manual (Page 21)

Heat & Glo • Everest • 750-900 Rev. o • 10/08 21
For Vertical Terminations - To locate the vent and
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)
clearance 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).
!
Figure 19. Minimum Height from Roof to Lowest
Discharge Opening
To seal the roof hole, and to divert rain and snow from the
vent system:
• Attach a fl ashing to the roof using nails, and use a non-
hardening mastic around the edges of the fl ashing base
where it meets the roof.
• Attach a storm collar over the fl ashing 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 snap into place.
NOTE: This also pertains to vertical vent systems
installed on the outside of the building.
WARNING: MAJOR U.S. BUILDING CODES
SPECIFY MINIMUM CHIMNEY AND/OR VENT
HEIGHT ABOVE THE ROOF TOP. THESE
MINIMUM HEIGHTS ARE NECESSARY IN
THE INTEREST OF SAFETY. SEE THE FOL-
LOWING DIAGRAM FOR MINIMUM HEIGHTS,
PROVIDED THE TERMINATION CAP IS AT
LEAST TWENTY INCHES FROM A VERTICAL
WALL AND 2-FEET BELOW A HORIZONTAL
OVERHANG.
Roof Pitch H (Min.) Ft.
Flat to 6/12...........................................1.0
Over 6/12 to 7/12 .................................1.25
Over 7/12 to 8/12 .................................1.5*
Over 8/12 to 9/12 .................................2.0*
Over 9/12 to 10/12 ...............................2.5
Over 10/12 to 11/12 .............................3.25
Over 11/12 to 12/12 .............................4.0
Over 12/12 to 14/12 .............................5.0
Over 14/12 to 16/12 .............................6.0
Over 16/12 to 18/12 .............................7.0
Over 18/12 to 20/12 .............................7.5
Over 20/12 to 21/12 .............................8.0
HORIZONTAL
OVERHANG
VERTICAL
WALL
GAS DIRECT VENT
TERMINATION CAP
12
X
ROOF PITCH
IS X/ 12
LOWEST
DISCHARGE
OPENING
2 FT.
MIN.
20 INCHES MIN.
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING