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Appendix D—HeatShift System
Rough Frame Opening
Rough
Frame
Opening
See appliance’s
installation for
minimum
combustible
cavity dimensions
Note - Min. cavity
dimensions may
be dictated by
LDK plenum when
installing across
corners.
Min. 1/2”
clearance to
combustibles
at ends
See detail
LDK 1 = 49”
LDK 4 = 39”
LDK 3 = 15”
LDK 9 = 31”
LDK 1 = 4”
LDK 4 = 4”
LDK 3 = 8”
LDK 9 = 4”
2 x 4 on edge
2 x 4 on edge
Framing on edge
5”
Framing and Clearances—Plenums, front view
!