4
Overview (applies to all kits)
Flexible or rigid,
5” diameter
UL-181, Class 1
Air Duct (4)
(use LDK6 kit
or equivalent)
Min. 2-1/2”
clearance
to ceiling
M
in. 30”
, M
ax. 12’-0”
S
ee table f
or off
sets
32-3/8”
8-1/2”
14-1/2”
9-3/8”
Ceiling
Min. 2-1/2”
clearance
to ceiling
Min. 1”
clearance to
combustibles
around pipes
Min. 1”
clearance to
combustibles
around pipe
Support horizontal
sections of pipe using
strapping every 24”
DO NOT RUN
pipe horizontal.
Minimum slope 4:12
Min. bend
radius
8”
5”
5”
4
12
Vertical Rise
‘Y’
(Min. 30”
Max. 12’-0”)
Maximum allowable Horizontal Offset
‘X’
(offset for take-off
that’s furthest away)
Ceiling
LDK 1, LDK 3 or LDK 4
+
Min. bend
radius
+
Top of fireplace
Y
Vertical Rise
X
Max. Allowable
Horizontal
Offset
30”
24”
36”
36”
42”
48”
48”
60”
54”
72”
60”
84”
66”
96”
12’-0”
96” Max.