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

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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