Hearth and Home Technologies Direct Vent Gas Appliance CD4842MR - Manual (Page 20)

Heatilator • Caliber Mesh CD Series-SIT Valve • 4040-849 Rev J • 06/08 20
Horizontal
overhang
12
X
20 in.
(508 mm)
Lowest
Discharge
Opening
Termination
Cap
Roof Pitch
is X / 12
Vertical
wall
H (min.) - Minimum height
from roof to lowest
discharge opening.
24 in. min.
(610 mm)
Roof Pitch H (Min.) Ft. Roof Pitch H (Min.) Ft.
Flat to 6/12 1.0* Over 11/12 to 12/12 4.0
Over 6/12 to 7/12 1.25* Over 12/12 to 14/12 5.0
Over 7/12 to 8/12 1.5* Over 14/12 to 16/12 6.0
Over 8/12 to 9/12 2.0* Over 16/12 to 18/12 7.0
Over 9/12 to 10/12 2.5 Over 18/12 to 20/12 7.5
Over 10/12 to 11/12 3.25 Over 20/12 to 21/12 8.0
* 3 ft. minimum in snow regions
Storm Collar
Roof
Flashing
Direct Vent Gas, Wood or Fuel
Oil Termination
20 in.
(508 mm)
(minimum) to
Perpendicular
Wall
(DV only)
Wood, Gas or
Fuel Oil
Termination
20 in. min. *
(508 mm)
Termination Caps Same Height
* If using decorative cap cover(s), this distance may
need to be increased. Refer to the installation instruc-
tions supplied with the decorative cap cover.
Figure 6.3 Leveled Termination Caps
A. Vent Termination Minimum Clearances
Figure 6.1 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
A Gas Termination Wood or Fuel Oil Termination
B 6 in. (152 mm) min. 20 in. (508 mm) min.
Direct Vent Gas, Wood or Fuel
Oil Termination
20 in.
(508 mm)
(minimum) to
Perpendicular
Wall
(DV only)
18 in.
(457 mm)
A
Gas
Termination
B
Termination Caps Staggered Height
Figure 6.2 Staggered Termination Caps