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Prefabricated roof curbs reduce installation time and costs by ensuring compatibility between the fan,
curb and roof opening. A wide variety of roof curbs are available including: flanged, straight-sided, canted,
pitched, ridged, vented, and sound-absorbing.
Extensions raise the fan discharge and can provide an accessible mounting location for dampers. Insect
screen bases and vented extensions are also available.
Roof Curbs & Extensions
Model Number Code
*Shown only when specified
Quick Delivery and Quick Build Programs
More than 50 configurations are stocked in our strategically located Greenheck
warehouses. Greenheck’s Quick Delivery (QD) program includes hundreds of in-stock
ventilation products and accessories available for shipment to your job site in less
than 24 hours.
Our Quick Build (QB) program ensures rapid response time with your needs dictating
manufacturing time. Your custom product configuration can be manufactured in one,
three, five, or ten days then shipped to your job site.
Leading Edge Technical Support
When you need extensive product information, look no further. Greenheck
products are supported by the industry’s best product literature, including
catalogs, Installation, Operation and Maintenance Manuals (IOM), electronic
media, Computer Aided Product Selection (CAPS) program and more. All of
these can be found at www.greenheck.com
Count on personal service and expertise from our national and international
representative organizations. To locate your nearest Greenheck
representative, call 715-359-6171 or visit our website at www.greenheck.com
Rectangular Curbs
GPI P - 30 x 42 - 22 x 34 - A 12
Curb
Model
Nominal
Curb Size
(Unit curb cap)
*Optional
Damper
Tray
Size
Material
A-Aluminum
G-Galvanized
Curb
Height
P-Pitched
R-Ridged
P-Pitched
R-Ridged
Curb
Model
Nominal
Curb Size
(Unit curb cap)
*Optional
Damper
Tray
Size
Material
A-Aluminum
G-Galvanized
Curb
Height
Square Curbs
GPI R - 34 - 24 - G 12
2