SECTION
8
: V
ENTING
39 of 59
8
.11 Outside Combustion Air Supply
IMPORTANT: If the
bu
ilding has a slight negati
v
e
press
u
re or corrosi
v
e contaminants, s
u
ch as
halogenated hydrocar
b
ons, are present in the air, an
o
u
tside com
bu
stion air s
u
pply to the heater is
req
u
ired. Seal all com
bu
stion air pipe joints.
Use of optional o
u
tside com
bu
stion air is not
recommended
w
ith
u
n
v
ented heaters.
The air s
u
pply d
u
ct may ha
v
e to
b
e ins
u
lated to
pre
v
ent condensation on the o
u
ter s
u
rface. The
o
u
tside air terminal m
u
st not
b
e more than 1' (31 cm)
a
b
o
v
e the
v
ent terminal.
8
.11.1 Len
g
th Re
q
uirements
Follo
w
the constraints listed
.
8
.11.2 Vertical Outside Air Supply for Sin
g
le Heater Installation
8
.11.3 Horizontal Outside Air Supply for Sin
g
le Heater Installation
Description
Part Number
Vent Cap 4" (10 cm)
90502300
Band Clamp
(Recommended)
Flex Hose
(Recommended)
Vent Cap
W
all
4" (10 cm)
Single Wall Pipe
Burner
Description
Part Number
Vent Cap 4" (10 cm)
90502300
Содержание BH-40
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