Greenheck Fan Explore the Greenheck Sure-Aire Features for Enhanced Fan Performance
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Optional Features

Sure-Aire™

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 a 4-20 mA output that can be tied into the building’s automation system.

Sound Sensitive Areas

Sound Vault Housing - Radiated Sound Enclosure

The sound vault housing is an excellent product for fans that will be positioned adjacent to an occupied work space or in sound critical applications. It locks in radiated sound from the fan casing, motor and drives, and minimizes vibration transmission. Standard construction includes an acoustically lined housing, integral spring isolators, and internal flexible connections at the fan’s inlet and outlet to effectively isolate the fan from the system. Vertical or horizontal mounting configurations are available.

This table lists the radiated sound reductions from total sound power levels for each octave band with the sound vault housing.

Why use a Sound Vault?

•Sound power attenuation levels determined by sound intensity tests on actual units

•Ships fully assembled with fan

•Internal isolation to limit breakout noise

•Access panels for inspection of fan and motor

•Bearing lubrication lines extended to outside of enclosure

•Formed mounting rails with prepunched holes for easy installation

•Available on both QEI-I and QEID through size 27 fans

Center Frequencies [Hz] 63 125 250 500 1000 2000 4000 8000

Attenuation Value (dB)

13 20 25 31

34

35

36

36

 

 

 

 

 

 

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Contents Mixed Flow Fans Quiet & Efficient, Inline Mixed Flow FansStandard Construction Model Number NomenclatureValue Added Features Maintenance / Serviceable Construction AdvantagesQuality Assurance Test Electrostatic Powder Coatings Inlet and Outlet Sound Power Levels Field Rotatable Housing / Compact Size Slip-Fit Duct Connections AutoCAD and 3-D Revit ModelsDesign & Performance Mixed Flow Axial/Centrifugal HybridSound and Efficiency Airflow ProfilesWheel Characteristics Sound Power versus Sound PressureBelt Drive Fan Class Direct Drive Percent Wheel WidthWhy use a Sound Vault? Optional FeaturesSound Vault Housing Radiated Sound Enclosure Optional Two-coat Paint System Zinc AdvantageCertifications & Listings Belt Drive versus Direct Drive Belt Drive AdvantagesDirect Drive Advantages Tubular Centrifugal Fan QEI-I Mixed Flow FanQEI-I/II Sizes Belt Drive Mounting ConfigurationsQEI-I/II Sizes 9-27 and all QEI-L Spark Resistant Construction Roof Upblast & Spark Resistant ConstructionRoof Upblast Accessories AvailabilityExploded View Direct Drive Selection Charts Qeid Dimensional Data 870 RPM 60 HzQEI Dimensional Data QEIQEI-9 Class Performance Data25 kW 381 mm73 kg QEI-12 Class I & QEI-L55 kg QEI-12 Class 82 kg64 kg QEI-15 Class I & QEI-L464 mm QEI-15 Class 100 kgQEI-16 Class I & QEI-L 508 mmQEI-16 Class 109 kgQEI-18 Class I & QEI-L 565 mm87 kg 118 kgQEI-18 Class 141 kg105 kg QEI-20 Class I & QEI-L622 mm QEI-20 Class 163 kgQEI-22 Class I & QEI-L 686 mm123 kg 168 kgQEI-22 Class 191 kgQEI-24 Class I & QEI-L 762 mm182 kg 213 kg249 kg QEI-24 Class55 kW QEI-27 Class I & QEI-L 838 mm214 kg 245 kgQEI-27 Class 304 kgQEI-30 Class I & QEI-L 75 kW927 mm 286 kgQEI-30 Class 454 kgQEI-33 Class I & QEI-L 1022 mm332 kg 449 kgQEI-33 Class 544 kg409 kg QEI-36 Class I & QEI-L1130 mm QEI-36 Class 635 kg680 kg QEI-40 Class1245 mm 862 kg 907 kg QEI-44 Class1378 mm 1043 kg 1089 kg QEI-49 Class1524 mm 11 kW 1406 kg1315 kg QEI-54 Class1676 mm 1633 kg 1588 kg QEI-60 Class1854 mm 1905 kg Specifications Model QEI-L, QEI-I/II and Qeid
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