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HVAC unit
base rails
Anchor screw
Flashing field
supplied
Roofing material
field supplied
Cant strip
field supplied
*Provided with roofcurb
ROOF CURB DETAIL
C
G
A
F
D
LARGE CURB
UNIT
CATALOG
SIZE
NUMBER
Small
CPRFCURB010A00
or
CPRFCURB011A00
Large
CPRFCURB012A00
Large
CPRFCURB013A00
* Part Numbers CPRCURB010A00 and CPRCURB011A00 can be used on both small and large basepan units. The cross supports must be located based on whether the
unit is a small basepan or a large basepan.
NOTES:
1. Roof curb must be set up for unit being installed.
2. Seal strip must be applied, as required, to unit being installed.
3. Roof curb is made of 16--gauge steel.
4. Attach ductwork to curb (flanges of duct rest on curb).
5. Insulated panels: 1--in. (25.4 mm) thick fiberglass 1 lb. density.
51901190402
HVAC unit
basepan
Sealing
Gasket
Roofcurb
Wood nailer*
Roofcurb*
Insulation
(field supplied)
A09090
B
H
A09415
B
A
(small/common
IN.
base)
(mm)
IN. (mm)*
11 (279)
10 (254)
14 (356)
11 (279)
14 (356)
14 (356)
Figure 4 - - Roof Curb Dimensions
G
C
F
A
SMALL/COMMON CURB
SUPPLY
AIR
RETURN
AIR
E
UNIT PLACEMENT ON
SMALL OR LARGE BASE UNIT
B
C
D
(large base)
IN.
IN.
IN. (mm)*
(mm)
(mm)
47.8
14 (356)
16 (406)
(1214)
Dashed lines show cross support
B
location for large basepan units.
H
D
SMALL
BASE
UNIT
LARGE
BASE
UNIT
COMMON CURB
E
F
G
IN.
IN.
IN. (mm)
(mm)
(mm)
32.4
30.6 (778)
(822)
2.7 (69)
43.9
42.2 (1072)
(1116)
E
A09413
A09094
A09414
H
IN. (mm)
46.1 (1170)
5
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