High Wind and Hurricane Zone Fans
Models H-G, H-GB, H-CUE and H-CUBE
Belt and Direct Drive Exhaust Fans
The Hurricane season has brought a new level of attention to wind resistance in the HVAC Industry. As you know, 2005 ended the worst hurricane season in history. With this increased level of awareness, comes a greater need for high wind resistant roof mounted equipment. To prevent water infi ltration and building damage, it is critical that roof top equipment stay affi xed to the roof. But how do you know which product can withstand high winds? Turn to Greenheck Models H-G, H-GB, H-CUE and H-CUBE to ensure your exhaust fans stay affi xed to the roof.
Hurricane winds start at 75 mph. At speeds of 150 mph, wind can exert a 61 pound per square foot pressure or over 750 pounds of force on a fan and curb. Forceful winds were the cause of most hurricane damage, exceeding $124 billion dollars in damage in 2005.
•Greenheck is leading the Hurricane Standards development
•Models H-G, H-GB, H-CUE and H-CUBE are third-party tested
•Finite Element Analysis (FEA) done by licensed Professional Engineer (including P.E. in Florida, Texas, Louisiana…)
•Full scale wind tunnel tested to 150 MPH
•Tested as an assembly
•No tie downs to roof are required
Severe weather calls for serious protection. We have the solution. Greenheck Models
H-G, H-GB, H-CUE and H-CUBE. Remember that these are the only tested and proven high wind resistant fans. Don’t sacrifi ce quality and durability–specify the only fans that will survive hurricane force winds.
November
2006
High Wind and Hurricane Zone Fans
®
Withstands winds up to 150 MPH
The Greenheck Models H-G and H-GB are downblast roof exhaust fans. Applications include general clean air and light moisture exhaust. The downblast design is ideal for all applications where air is discharged directly onto the roof surface. Models H-G and H-GB have been specifi cally designed for high wind and extreme weather applications. Structural bracing on the interior of the fan, tabbed and riveted curb cap corners, and high strength materials provide the added strength required to withstand winds of up to 150 MPH. Standard with a 12 inch (305 mm) tall H-GPF curb, no tie downs to the roof are required. (Other curb options are available.)
Performance: For full performance listings refer to the H-G and H-GB
Catalog.
•Air performance up to 14,000 CFM (24,000 m3/hr).
•Pressure range from 0-2.75 inches wg (0-700 Pa).
•All fan sizes are tested in our AMCA Accredited Laboratory, and all models are licensed to bear the AMCA sound and air performance seal.
Standard Construction
•Internal Bracing - High strength internal support structure and bracing.
•Shroud - Heavy gauge reinforced drawn shroud with integral rolled bead for consistent material thickness and strength.
•Drive Assembly - Motor and drive frame are isolated from the airstream and mounted on true vibration isolators, and sized for 150% of maximum driven horsepower. (No steel to steel contact)
•Bearings - Pillow block design selected for a minimum average L10 life in excess of 100,000 hours (L50 life of 500,000 hours) at maximum cataloged speed.
•Disconnect - NEMA-1 disconnect is mounted and wired from the factory.
The Greenheck Models H-CUE and H-CUBE are upblast roof exhaust fans. Applications include restaurant exhaust and mild contaminants. The upblast design is ideal for all applications where it is important to discharge air away from the roof surface. Models H-CUE and H-CUBE have been specifi cally designed for high wind and extreme weather applications. Structural bracing on the interior and exterior of the fan, tabbed and riveted curb cap corners, and high strength materials provide the added strength required to withstand winds of up to 150 MPH. Standard with a 12 inch (305 mm) tall H-GPF curb, no tie downs to the roof are required. (Other curb options are available.)
Performance: For full performance listings refer to the H-CUE and
H-CUBE Catalog.
•Air performance up to 14,700 CFM (25,000 m3/hr).
•Pressure range from 0-5 inches wg (0-1,250 Pa).
•All fan sizes are tested in our AMCA Accredited Laboratory, and all models are licensed to bear the AMCA sound and air performance seal.
Standard Construction
•Internal Bracing - Additional high strength internal bracing structure.
•External Bracing - Integral high strength mounted external bracing.
•Windband - Heavy gauge one piece windband with integral rolled bead, 100% welded to an aluminum curb cap.
•Drive Assembly - Motor and drive frame are isolated from the airstream and mounted on true vibration isolators, and sized for 150% of maximum driven horsepower.
•Bearings - Bearings are pillow block design selected for a minimum average L10 life in excess of 100,000 hours (L50 life of 500,000 hours) at maximum cataloged speed.
•Disconnect - NEMA-1 disconnect is mounted and wired from the factory.
•Curb Cap - Heavy gauge with pre-punched mounting holes.
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High Wind and Hurricane Zone Fans
®
Third Party Testing and Certifications
The Greenheck high wind models have been thoroughly tested in accordance with recognized standards. With the H-G, H-GB, H-CUE and the H-CUBE you are not only getting a superior product built by a quality company, you are getting the assurance through a number of third party certifi cations that the fan is capable of withstanding high winds.
•State P.E. Calculations: Models have been reviewed by state licensed professional engineers to ensure that they conform to the requirements of ASCE 7-02 Minimum Design Loads for Buildings and Other Structures, International Building Code and the Florida Building Code.
•Test Protocols: Models have been subjected to an extensive testing regime. The models have been tested in accordance with ASTM E330 standards at design pressures that correspond to over 150 MPH wind loads.
•Computational Fluid Dynamics (CFD):
Greenheck leads the industry with cutting edge technology. Computational Fluid Dynamics simulates the airfl ow of high speed (150 MPH) winds over the surface of fans. The software records the force profi le that the wind exerts on the fan, which can be used to complete Finite Element Analysis of the stresses in each unit. Models have been completely analyzed utilizing CFD to prove superior strength and resistance to high winds.
•Finite Element Analysis (FEA) Utilizing the results from CFD analysis Greenheck can accurately predict the stress, strain, and
defl ection that result from high wind loads. A complete FEA utilizing CFD results is used to verify the fans capabilities and prove the results of professional engineer calculations.
When high wind forces are a concern, turn to Greenheck’s high wind models. Models H-G and H-GB downblast roof exhaust fans and H-CUE and H-CUBE upblast restaurant exhaust fans are the only fans tested and certifi ed to
withstand high winds. Don’t sacrifi ce quality and durability—specify the only fans that will survive hurricane force winds, Greenheck models H-G, H-GB, H-CUE and H-CUBE.
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