12 Heatilator • RBV4236/RBV4842 • 4048-210 Rev K • 02/07
A. Vent Termination Minimum Clearances
Fire Risk
Explosion Risk
• Do not pack air space with insulation or
other materials.
Maintain vent clearance to combustibles as
specifi ed.
WARNING
Failure to keep insulation or other materials
away from vent pipe may cause fi re.
A Gas Termination Wood or Fuel Oil Termination
B 6 in. (152 mm) min. 20 in. (508 mm) min.
B-Vent Gas, Wood or Fuel
Oil Termination
8 ft
(2.44 m)
(minimum) to
Perpendicular
Wall
(gas only)
18 in.
(457 mm)
A
Gas
Termination
B
B-Vent Gas, Wood or Fuel
Oil Termination
8 ft
(2.44 m)
(minimum) to
Perpendicular
Wall
(gas only)
Wood or
Gas Termination
20 in. min. *
(508 mm)
Termination Caps Same Height
Termination Caps Staggered 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 4.2 Multiple Vertical Termination
Figure 4.1 specifi es minimum vent heights for various
pitched roofs.
4
4 Termination Locations
12
X
8 ft
(2.44 m)
Lowest
Discharge
Opening
Termination
Cap
Roof Pitch
is X / 12
Vertica l
wall
H (min.) - Minimum height
from roof to lowest
discharge opening.
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
Figure 4.1
Minimum Height from Roof to Lowest Discharge Opening
¨