Figure 12: Separated Combustion Heater - Vertical; Figure 13: Concentric Vent Box - Roberts Gorden Combat UHA[X][S] 100 Installation & Operation Manual

Figure 12: Separated Combustion Heater - Vertical and Horizontal Vent Termination
Minimum from air inlet to vent
termination (may be horizontal
or vertical clearance).
NOTE: Vent supports not
shown.
4" (10 cm) Diameter
Model Air Intake & Vent Diameter Part Number
UHA[X]S 30 - 125

Figure 13: Concentric Vent Box

Seal joint between single wall
and Type B vent with silicone sealant.
Combustion Air
to Heater
Exhaust
from Heater
12" (31 cm)
Air Intake
Vertical
Option
4" (10 cm) 90502102
Use 3 sheetmetal
screws equally
spaced around joint.
4" (10 cm) Single
Wall Vent Pipe
(By Others)
12" (31 cm)
Minimum from wall
to vent termination.
4"
(10 cm)
Diameter Vent
Listed Thimble
12" (31 cm)
through
Minimum from wall
Combustible Wall
to vent termination.
4" (10 cm)
Diameter Vent
4" (10 cm)
Diameter
Air Intake
Horizontal
Option
Use 3 sheetmetal
screws equally
spaced around collar.
SECTION 6: V
Vent
Termination
Air Intake
Termination
12" (31 cm)
Minimum from air inlet to vent
termination (may be horizontal
or vertical clearance).
Toward
Outside
6" (15 cm) Single
Wall Inlet Air Pipe
(By Others)
Concentric
Vent Box
ENTING
19