Zephyr ceiling and inline fans are designed and constructed to create a quiet and reliable product. Each unit is fully assembled and tested prior to shipment. Extensive combinations of wheel sizes and speeds enable the Zephyr to cover a wide range of CFM.  Zephyr performance can be precisely adjusted with the use of a Lek-Trol™ speed control. Mounted either on the unit or remotely, Lek-Trols™ can be used to accommodate variable ventilation needs. For sound critical applications, the Zephyr S series delivers the lowest sound ratings. All Zephyrs feature acoustically insulated housings, custom designed blower and motor pairings, motors mounted on vibration isolators. Wiring the Zephyr is quick and easy. Access to the motor leads is through a panel in the side of the unit; there is no need to remove the power pack. However, if the need to remove the power pack ever arises, a quick connect plug makes the process simple and easy. All units have permanently lubricated motors manufactured to PennBarry’s exacting specifications. Motors feature built in overload protection and plug in disconnects. Wheels are dynamically balanced and performance matched with the motor. On models Z5H and larger dual inlet blowers are employed to minimize sound levels. Housings are fabricated of galvanized steel.