Greenheck Fan ATS, ATI, GPR, ATR User Manual
Roof Curbs, Extensions and
Equipment Supports
August
2008
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Roof Curbs & Extensions
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.
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
Model Number Code
Square Curbs
GPI R - 34 - 24 - G 12
GPI P - 30 x 42 - 22 x 34 - A 12
Rectangular Curbs
Curb
Model
P-Pitched
R-Ridged
Nominal
Curb Size
(Unit curb cap)
*Optional
A-Aluminum
G-Galvanized
Damper
Tray
Size
Material
Curb
Height
Curb
Model
P-Pitched
R-Ridged
Nominal
Curb Size
(Unit curb cap)
*Optional
Damper
Tray
Size
Curb
Height
Material
A-Aluminum
G-Galvanized
*Shown only when specified
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Model GPI Standard
Construction Features
INSULATION - Ridged fiberglass insulation is standard on
all GPI curbs. The insulation is securely attached at both the
top and bottom with an insulation tray so it will not have any
exposed ends. Three pound density insulation is available in
1, 11⁄2, and 2-inch thicknesses.
FORMED BODY CURB -
Curbs are perfectly formed
on three sides and have only
one welded seam to ensure a
strong square curb.
LAP JOINTS - Wood
nailers attached to GPI
curbs consist of notched
and lapped joints to ensure
strength and durability.
CONSTRUCTION -
Curb sizes under
50 inches square are
18 gauge galvanized
steel or 0.064 aluminum.
Curb sizes 50 inches
square and greater are
16 gauge galvanized
steel or 0.080 aluminum.
OPTIONAL COATINGS -
A wide variety of coatings and
colors are available:
Decorative coatings are available in
sixteen standard colors.
Protective coatings are available
in five electrostatically applied
powders providing a selection for
most environments.
All coatings and relative resistance
charts can be found in Greenheck’s
Product Application Guide for
Performance Coatings for Ventilation
Products.
OPTIONAL SECURITY BARS -
Model GPI with security bars is
available up to 50 by
92 inches to prevent
unlawful entry. The bars
consist of 1/2-inch diameter
A-36 mild steel, welded
6 inches apart from one
another and are powder
coated.
OPTIONAL DAMPER TRAY -
Designed to hold a standard
Greenheck damper. The design
includes flanges, which allow the
damper to be placed in the tray
and fastened.
OPTIONAL CURB SEAL - This rubber seal between
the fan and the curb cap is available to ensure
proper performance of the fan. The seal also helps
prevent insects and moisture from entering and
reduces vibration transmission in the ductwork.
OPTIONAL LINER (Double Shell) - Available for
installations where it is not desirable for insulation
to be exposed to the airstream.
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