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Appendix D—HeatShift™System
Overview (applies to LKD1, LDK3, LDK4 and LDK9 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”
[762 mm]
M
ax. 12’-0”
[3,658 mm]
See table f
or off
sets
36-15/16”
[938 mm]
8-3/4”
[222 mm]
8-11/16”
[221 mm]
Ceiling
Min. 1”
clearance to
combustibles
around pipe
19-1/2”
[496 mm]