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Damper tray mounts inside of a GPI roof curb to allow for easy installation of a backdraft damper. Constructed of galvanized steel.

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

Model MP-100A is a damper actuator pack used to convert the WD-100 horizontal mount backdraft damper to motorized operation. These versatile motor packs feature power opening with spring return. The springs also provide damper closure in the event or electrical failure. MP-100A motor packs are supplied with mounting hardware, assembly instructions and actuator arms for either single or double panel installation. Rated for 115-230V. UL Listed.

The BD-100 is a horizontal mount backdraft damper 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 with aluminum blades.

• Complies with the International Energy Conservation Code (IECC) and ASHRAE 90.1 leakage requirements for non-motorized dampers
• AMCA certified for Air Leakage and Air Performance
• 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

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

Series MP-100 is a damper actuator pack used to convert the WD-100 horizontal mount backdraft damper to motorized operation. These versatile motor packs feature power opening with spring return. The springs also provide damper closure in the event or electrical failure. MP-100 motor packs are supplied with mounting hardware, assembly instructions and actuator arms for either single or double panel installation. Rated for 460V. UL listed.