SECTION 6: V
ENTING
19
Figure 12: Separated Combustion Heater - Vertical and Horizontal Vent Termination
Figure 13: Concentric Vent Box
V
ent
Termination
Listed Thim
b
le
thro
u
gh
Com
bu
sti
b
le
W
all
4" (10 cm)
Diameter
V
ent
12" (31 cm)
Minim
u
m from
w
all
to
v
ent termination.
4" (10 cm)
Diameter
Air Intake
12" (31 cm)
Minim
u
m from air inlet to
v
ent
termination (may
b
e horizontal
or
v
ertical clearance).
Air Intake
Termination
4"
(10 cm)
Diameter
V
ent
4" (10 cm) Diameter
Air Intake
12" (31 cm)
Minim
u
m from air inlet to
v
ent
termination (may
b
e horizontal
or
v
ertical clearance).
Vertical
Option
Horizontal
Option
12" (31 cm)
Minim
u
m from
w
all
to
v
ent termination.
NOTE
:
V
ent s
u
pports not
sho
w
n.
Model
Air Intake & Vent Diameter Part Number
UHA[X]S 30 - 125
4" (10 cm)
90502102
4" (10 cm) Single
W
all
V
ent Pipe
(By Others)
Seal joint
b
et
w
een single
w
all
and Type B
v
ent
w
ith silicone sealant.
Use 3 sheetmetal
scre
w
s e
qu
ally
spaced aro
u
nd joint.
Use 3 sheetmetal
scre
w
s e
qu
ally
spaced aro
u
nd collar.
Concentric
V
ent Box
6" (15 cm) Single
W
all Inlet Air Pipe
(By Others)
One piece of 4" (1
0 cm) diamet
er, 1/4" (6 cm) air
space t
ype
“B”
v
ent. Selkir
k Model R
V
or e
qu
i
v
alent.
(By other
s)
Com
bu
stion Air
to Heater
To
w
ard
O
u
tside
Exha
u
st
from Heater
