Greenheck Fan GB manual Options and Accessories, Roof Curbs

Options and Accessories

Roof Curbs

Prefabricated roof curbs reduce installation time and costs by ensuring compatibility between the fan, the curb and roof opening.. All curbs are insulated with fiberglass. A wide variety of roof curbs are available, including: flanged, pitched and sound-absorbing..

Hinged Curb Cap with Cables (Field Installed)

Mounted to the curb cap, allows entire fan to tilt away from curb for access to wheel and ductwork. Includes restraint cables..

Hinged Base (Factory Mounted)

Allows for easy maintenance.. Hinge and restraining cables are factory mounted to a subbase attached directly to curb without additional height added..

Curb Seal

Rubber seal between fan and curb to assure proper sealing when attached to a curb.

Curb Extensions

Extensions raise the fan discharge above the roofline and provide an accessible mounting

location for dampers.. Insect screen

bases, constructed with a removable fine mesh, are recommended for applications where insect entry must be prevented..

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High Wind and Severe Duty Roof Curbs

Provided as an option with models G and GB. The severe-duty roof curb models can ship separately to allow for final finishing of the roof prior to the fan arrival and installation..

Model GPF — This roof curb is used on fan models G/GB and specifically designed for high wind applications up to 75 psf.. Curbs are minimum

18 gauge construction in a standard height of

12 inches (305 mm), with fully-welded straight sides and a 5-inch flashing flange.. GPF is available up to 24 inches (460 mm) in height to meet greater height requirements..

Models SD and SDP — These severe-duty curbs for fan models G and GB are specifically designed for high wind applications up to 150 mph, maximum design load of 130 psf.. Model SD is for use on

flat roofs and model SDP for pitched roofs.. They are attached directly to the building structure with extremely high structural design load requirements.. The severe duty curbs are 12 gauge coated steel with a 13⁄4-inch lip on the top and a 4-inch flange on the bottom.. Available heights include 12–24 inches.. Heights greater than 18 inches are reinforced in the interior with 12 gauge x 2-inch angles.

Mounting details for the roof curb to the roof substrate and the fan to the curb are included with each model G and GB installation manual..

For additional information refer to the Greenheck High Wind brochure.

Tie-Down Points

Four brackets located on the shroud for securing the fan in high wind applications.. Cables and anchors by others..