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GPI roof curbs are designed for flat, insulated or non-insulated roof decks. Constructed of 18 gauge galvanized steel and fully formed on three sides with a single, fully welded seam.

• Designed to fit 22" roof curb cap
• 2-inch mounting flange
• Rigid, fiberglass insulation
• Welded, straight-sided construction

Speed controls are used for manual adjustment of the fan鈥檚 performance (for final system balancing) or to control the fan鈥檚 output in confined spaces, such as conference or meeting rooms. The fan can be adjusted to 60% of design airflow with a speed control. This reduction in airflow and fan speed is also accompanied by a reduction in noise level. Note: For use on direct drive fans with single phase, PSC or shaded pole motors.

Hinge curb bracket kits allow the fan to tilt away from the curb for access to the wheel and ductwork for inspection and cleaning.

The WD-100 series are horizontally mounted backdraft dampers designed to allow vertical airflow up and prevent reverse airflow. The dampers are opened by air pressure differential (assisted by springs) and closed by gravity. The damper features a flangeless, galvanized steel frame and aluminum blades.

• Width and height furnished approximately 0.125 in. under size

GPI roof curbs are designed for flat, insulated or non-insulated roof decks. Constructed of 18 gauge galvanized steel and fully formed on three sides with a single, fully welded seam.

• Designed to fit 22" roof curb cap
• 2-inch mounting flange
• Rigid, fiberglass insulation
• Welded, straight-sided construction

Speed controls are used for manual adjustment of the fan鈥檚 performance (for final system balancing) or to control the fan鈥檚 output in confined spaces, such as conference or meeting rooms. The fan can be adjusted to 60% of design airflow with a speed control. This reduction in airflow and fan speed is also accompanied by a reduction in noise level. Note: For use on direct drive fans with single phase, PSC or shaded pole motors.

Curb adapters are designed to adapt standard curb cap dimensions to existing curb when replacing a fan or ventilator. Constructed of galvanized steel. For use with model AE, sizes 12 through 14, model AS, sizes 12 through 14, model CUBE, sizes 141 through 161, model CUE, sizes 141 through 161, model G, sizes 143 through 163, and model GB, sizes 141 through 161.

• Increases mounting area of fan base to fit larger curb
• Adapt your existing curb to a new rooftop unit
• Allows for quick and easy replacements
• Galvanized steel construction

Model GPF roof curbs are designed for high wind applications and flat roof installations. Constructed of heavy gauge galvanized steel and fully formed on three sides with a single, fully welded seam.

• Designed to fit 22" roof curb cap
• 2-inch mounting flange
• Rigid, fiberglass insulation
• Welded, straight-sided construction

Hinge kit allows the fan to hinge at the base of the curb cap for access to the wheel and ductwork for inspection and cleaning.

Model GPF roof curbs are designed for high wind applications and flat roof installations. Constructed of heavy gauge galvanized steel and fully formed on three sides with a single, fully welded seam.

• Designed to fit 22" roof curb cap
• 2-inch mounting flange
• Rigid, fiberglass insulation
• Welded, straight-sided construction

GPI roof curbs are designed for flat, insulated or non-insulated roof decks. Constructed of 18 gauge galvanized steel and fully formed on three sides with a single, fully welded seam.

• Designed to fit 22" roof curb cap
• 2-inch mounting flange
• Rigid, fiberglass insulation
• Welded, straight-sided construction