Heatilator • GDST4336I, GDFL4136I, GDCR4136I, GDCL4136I • 2129-900 Rev. F • 11/08 23

A. Vent Termination Minimum Clearances

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 6.1 Minimum Height From Roof To Lowest Discharge
Opening
* 3 foot minimum in snow regions
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
6
6 Termination Locations

Fire Risk.

Maintain vent clearance to combustibles as

specifi ed.

• DO NOT pack air space with insulation or other

materials.

Failure to keep insulation or other materials away

from vent pipe may cause overheating and fi re.

WARNING
Figure 6.2 Staggered Termination Caps
Gas, Wood or Fuel Oil
Termination Cap
Minimum
= 20 in.
(508 mm)
B
Gas
Termination
Cap **
A *
Perpendicular Wall
*Ifusing decorative cap cover(s ), this distance may need to be
increased.Refer to the installation ins tructions supplied with the
decorativecap cover.
** Ina staggered installation with both gas and wood term inations, the
woodtermination cap must be higher than t he gas termination cap.
AB
6in.(minimum)upto20in.
152mm/508 mm 18in. minimum
457mm
20in. and over 0in. minimum