Hearth and Home Technologies CFX-Crescent - Manual (Page 26)

Heat & Glo • CFX-CRESCENT • 705-900 Rev. P • 12/07 26
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
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 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.
1. Attach the flashing
and apply sealant
around the edges of
the flashing base.
2. Attach the storm
collar over the flash-
ing joint and apply
sealant between the
storm collar and
vertical pipe.
HORIZONTAL
OVERHANG
VERTICAL
WALL
TERMINATION
CAP
12
X
ROOF PITCH
IS X/ 12
LOWEST
DISCHARGE
OPENING
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING
2 FT.
MIN. 2 FT. MIN.