Mixed Flow Fans Belt and Direct Drive Models QEI, QEID r^GREENHECK Building Value j‘n Air.

f^GREENHECK Building Value in Air. Mixed Flow Fans Mixed flow inline fans can be used for supply, exhaust, or return air installations. Our patented design excels in commercial applications where low sound is critical. In addition, Greenheck’s mixed flow fans are more efficient than comparably sized tubular centrifugal and vane axial fans, thus reducing the required motor horsepower and lowering operating costs. Greenheck’s mixed flow fans are the quietest tubular inline fans in the industry! • Performance as cataloged is assured. All sizes are licensed to bear the AMCA Certified Sound (both inlet...

f^GREENHECK Building Value in Air. Housing Tubular housings are constructed of welded steel to eliminate air leakage. Integral straightening vanes are constructed from steel and welded into place. Wheel - Mixed Flow Fabricated wheels are constructed from steel. The blade profiles are angled and contoured for the most efficient and quiet performance. Bearings (Belt Drive) Standard bearings are premium air handling quality, grease lubricated, self-aligning, ball or roller type. Bearings are selected with a basic rating fatigue life L10 per ABMA standards, in excess of 80,000 hours (L50 at 400,000...

GREENHECK Building Value in Air. Quality Assurance Test Before shipment, all Greenheck mixed flow fans are tested at the design speed after final assembly. QEI and QEID fans are checked for amp draw and the levels are recorded. QEI and QEID fans are also subjected to a complete vibration analysis. The maximum allowable vibration on a QEI at the fan bearings is 0.15 in/sec. peak velocity for the specified RPM. QEID maximum vibration is 0.08 in/sec. peak velocity on the fan housing for the specified RPM. A record of the vibration test result is available upon request. By performing the vibration...

Inlet and Outlet Sound Power Levels All Greenheck mixed flow fans have AMCA licensed sound power levels for both the fan inlet and outlet. Application and installation determines which sound power reading (inlet, outlet, or both) is critical. The differences between the generated sound from the inlet and outlet are important and noticeable. AMCA licensed inlet and outlet sound power data provides complete sound information to select a fan based on the acoustical requirements. For additional information on sound, refer to page 6. Field Rotatable Housing / Compact Size The QEI are designed to accommodate...

f^GREENHECK Building Value in Air. Mixed Flow: Axial/Centrifugal Hybrid A mixed flow wheel is a hybrid between an axial propeller and a centrifugal wheel. The result is a design that combines the best axial and centrifugal properties: highly efficient air movement, increased pressure capabilities, extremely low sound levels, and a steep fan performance curve. To further enhance the fan’s performance, straightening vanes are incorporated in the housing. These serve to convert swirling airflow into a straight axial flow with a resulting static pressure rise and energy savings. Axial Fans: Straight...

f^GREENHECK Building Value in Air. Belt Drive: Fan Class Class I and II fans have different wheel designs with different performance characteristics. Class I mixed flow wheels are optimized for performances involving low pressures and high volumes. Class II wheels are designed for a steeper fan curve with higher pressure capabilities. This is illustrated in the graph with the two different class wheels plotted at identical fan RPMs. When selecting a mixed flow fan, it cannot be assumed that moving into a Class II fan will produce the same results as a Class I mixed flow fans. Direct Drive: Percent...

Optional Features The Sure-Aire™ flow monitoring system measures fan flow within a 3% accuracy. Unlike traditional flow probes mounted in the fan venturi that create a system effect hindering fan performance, Sure-Aire™ does not interfere with airflow and will not impact the fan’s air or sound performance. This option is available on all mixed flow fan models and ships completely assembled from our factory. An electronics package with pressure transmitter and digital read out is available with the Sure-Aire™ system. The electronic kits are available for 50 or 60 Hz power supplies and provide either...

In 1972, Greenheck took the lead as the first commercial and industrial fan manufacturer to introduce electrostatic powder coatings. Today, Greenheck continues to lead by being the first to offer a superior zinc-rich powder basecoat and powder coating finish. This zinc-rich basecoat technology is used extensively outside the HVAC industry to protect bridge beams, automotive components and other heavy-gauge steel products. Now, this advanced technology is available on Greenheck welded steel products. Greenheck’s coating process starts with a minimum of five wash stages to treat all components...

Seismic Certification The International Building Code (IBC) has been adopted at the state and local level throughout the United States. With the adoption of this code, comes the introduction of standards intended to improve the performance and design of non-structural systems subject to seismic events. QEI and QEID • Meet the 2006 IBC, 2009 IBC • California OSHPD requirements (horizontal mount only) OSP 0223-10 • Shake table tested at an independent test facility in accordance with ICC-ES AC 156 • All equipment certified to worst case scenario seismic conditions - Importance factor of 1.5 (IP...

f^GREENHECK Building Value in Air. Belt Drive Advantages • Lower sound levels • Motor out of the airstream for easy access • Motor size may be changed to accommodate possible future air capacity requirements • Final system balancing accomplished by changing drives Direct Drive Advantages • Fewer wear components and less maintenance, no shaft, bearings, pulleys, or belts • More compact than equivalent belt drive size • Motor in airstream for increased motor efficiency and cooling • Equal loading between mounting brackets • Final system balancing accomplished by adjusting the motor speed (ex. variable...