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349687-JTG-A-1007
Johnson Controls Unitary Products 35
1. The 2” space between the ducts allows for “jumping” an
existing roof joist.
2. The 58-1/2” overall dimension of the ducts allows duct-
work penetration between roof joists that are spaced on
72” centers.
Note: Ducts can be installed into the curb from the roof. All
electrical and gas line connections can be made inside the
curb.
FIGURE 10 - UNIT ROOF CURB DIMENSIONS
25-1/4"
FIGURE 11 - ROOF CURB DUCT OPENINGS
DIMENSION
FIGURE 12 - CUT AWAY OF ROOF CURB