Centrifugal Roof Downblast Exhaust Fans • General Clean Air • Light Contaminants • Seismic • High Wind • Variable Volume Performance data now included.

Spun Aluminum • Downblast Centrifugal Roof Exhaust Fans High Wind & Hurricane, Seismic .. .49 High Wind & Hurricane, Greenheck Fan Corporation certifies that the Models G and GB fans shown herein are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and Publication 311 and comply with the requirements of the AMCA Certified Ratings Program. The certified ratings for Models G and GB are shown on G and GB models are listed for electrical GB models for Emergency Smoke Control Systems (UL/cllL Listed for 500T (260*C)...

Models G and GB Spun Aluminum • Downblast Centrifugal Roof Exhaust Fans Model Comparison Drive Type Relative Cost Mixed Flow High Wind** Roof Curb Spark Resistant Ceiling Mounted Maximum Static Pressure (in. wg) Impeller Type Performance Continuous High Temp (above 200°F ) Greenheck models G and GB centrifugal roof exhaust fans provide the industry’s best performance and durability for general clean air applications where air is discharged downward, toward the roof surface. • Broadest performance in the industry, up to 3.25 in. wg (810 Pa) and 45,000 cfm (76,500 m3/hr). • Most advanced motor...

Construction Features Models G and GB Standard Construction Features 1 An aluminum, backward-inclined, non-overloading centrifugal wheel is utilized to generate high-efficiency and minimal sound. Wheel cones are carefully matched to the venturi for maximum efficiency. Each wheel is robotically welded and statically and dynamically balanced for long life and quiet operation. Disconnect Switch NEMA-1 switch is factory mounted and wiring is provided from the motor as standard (other switches are available). All wiring and electrical components comply with the National Electrical Code® (NEC) and...

Construction Features Models G and GB 6 MODEL G DIRECT DRIVE DRIVE FRAME (BELT DRIVE) 13 18 19 MODEL GB BELT DRIVE

Emergency Smoke Control - GB When you buy a Greenheck model GB with the smoke control option, you receive a fan with the industry’s best performance and durability for smoke control applications (as found in emergency smoke control systems). GB smoke control models are: 101, 101-HP, 121, 131, 141, 141-HP, 161, 161-HP, 200, 240, 300, 360, 420, 480 • UL/cUL Listed for 500°F (260°C) for 4 hours and 1,000°F (538°C) for 15 minutes. • Half the weight of traditional smoke control fans, ideal choice for roof load concerns. • Low prole, height is less than half of traditional smoke control fans, maximum...

High Wind and Hurricane - G and GB Greenheck is leading the High Wind Standard for roof top fans and ventilators. Forceful winds and wind-borne debris are the cause of most hurricane damage. Hurricane winds start at 75 mph. and can exert a force of 75 pounds per square foot of pressure—or over 900 pounds on a fan and curb. Forceful winds are not the only problem, wind-borne debris can also cause detrimental effects to objects and structures. High winds and extreme forces are the cause of most storm damage. By analyzing calculations, computer simulations, actual testing, and other standards—Greenheck...

Vari-Green® Motor Option Greenheck’s electronically commutated (EC) Vari-Green (VG) motor combines motor technology, controllability and energy-efciency into one single low maintenance unit and is the industry’s rst fully controllable motor. When combined with Greenheck’s G fans, all the CFM and static pressure ranges of a belt drive can be attained with the benets of a direct drive. 1. Dial on Motor Control - a potentiometer (dial on motor control) is mounted on the motor for easy speed adjustment for system balance. Simply turn the dial. There are no belts and pulleys to adjust. 2. Control...

Vari-Green® Control Options Vari-Green® Controls Transformer - Provides 24V power from the existing line voltage at the fan to the Vari-Green motor and controls. Dual voltage primary (120/240V) transformer provided with the fan. Remote Dial - Allows for remote, manual airow adjustments. Wall plate with dial may be mounted in a standard 2x4 inch electrical junction box. Two Speed Control with Integral Transformer Control allows motor rpm to be set at two independent speeds (high or low). Meets minimum airow requirements with the ability to bump up to high speed in an emergency or meet maximum...

Roof Curbs High Wind and Severe Duty 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 berglass. A wide variety of roof curbs are available, including: anged, pitched and sound-absorbing. GPF/GPFP/GPFR – Approved for high wind applications up to a 75 psf wind-load rating. Constructed of 18 gauge steel, formed and welded sides, and a 5-inch ashing ange. GPF is available up to 42 inches in height. GPFP and GPFR are available up to 24 inches in height. Hinged Curb Cap with Cables...

Speed Controllers for Standard Motors Available for use with shaded pole and permanent split capacitor (PSC) open motors on model G fans. They provide an economical means of system balancing with direct drive fans. Birdscreen Galvanized mesh is standard, optional aluminum or stainless steel rigid wire are also available. Disconnect Switches A wide selection of NEMA rated switches are available for positive electrical shutoff and safety, including: dust-tight, rainproof, and corrosion-resistant. Switches may be internally or externally mounted. G and GB models are Listed for electrical (UL/cUL 705)...

Typical Installations Models G and GB General Clean Air (figure 1) Factory Wired from Motor to Disconnect Models G and GB exhaust fans are designed to meet the needs of general clean air applications. Tests were conducted to assure safe, rugged and reliable fans. Due to the varying types of airstreams encountered in commercial ventilation, system designers must be aware of national, state, and local codes and guidelines governing these installations. Local code authorities should be consulted before proceeding with any ventilation project. figure 1 3/4 in. Wiring by Others • When roofing materials...