Standard Construction

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 hours) at the maximum operating speed for the QEI-I/II and QEI-L in the horizontal position. The QEI-L bearings are selected with a basic rating fatigue life L10 in excess of 50,000 hours (L50 at 250,000 hours) in vertical position.

Bolted Access Door

A bolted access door provides an opening through the fan housing for cleaning or visual inspection of the wheel. A hinged access door is available as an accessory.

Belt Guard (Belt Drive)

A totally enclosed belt guard provides protection from rotating pulleys and belts. Belt guards meet OSHA Standards.

Slip-Fit Duct Connection (QEI-I/II & QEID)

Inlets and outlets are designed with extended collars for slip-fit duct connections as standard. QEI-L is flanged as standard. Companion flanges can be ordered for slip fit connections.

Adjustable Motor Bases (Belt Drive)

Rigid, heavy-gauge steel motor bases are welded to the fan housing and include heavy-duty adjustment screws for belt tensioning.

Extended Lube Lines

Belt drive units have nylon lubrication lines with grease fittings that allow bearing lubrication without disassembling the fan. Grease fittings are mounted on the outside of the fan housing. Direct drive units have extended lubrication lines for the motor bearings, if required. Smaller frame sized motors are typically sealed and not lubricatable.

Permatector™ Coating

Greenheck’s Permatector coating is a thermosetting polyester urethane, electrostatically applied to provide uniform thickness and a clean appearance. Permatector coatings also provide excellent corrosion characteristics for general applications, both indoor and outdoor. For corrosive environments (ie. coastal), see page 9 for information on our zinc- rich basecoat technology.

Model Number Nomenclature

The model number code provides a numbering system designed to identify the fan model, size and horsepower.

QEI D* - 36 - I - 70 - A 30

D = Direct Drive		Motor Horsepower					300	= 30


	4		= ¼	30	=	3
Fan Size	3		= 3	50	=	5	400	= 40
	5		= ½	75	= 7½		500	= 50

9, 12, 15, 16, 18, 20,
	7		= ¾	100	= 10		600	= 60
22, 24, 27, 30, 33, 36,
	10		= 1	150	= 15		750	= 75
40, 44, 49, 54, 60
	15		= 1½	200	= 20		1000	= 100
Belt Drive available in sizes 9 through 60
	20		= 2	250	= 25		1250	= 125
Direct Drive available in sizes 12 through 54

Construction		RPM
		RPM
		A = 1770	C = 870	J = 1425	M = 3600
L = Low Pressure		A = 1770	C = 870	J = 1425	M = 3600
L = Low Pressure		B = 1170	F = 690	K = 950	R = 2900
I = Class I	Percent Wheel Width
II = Class II

	50 through 100
Low Pressure available in sizes 12 through 36	50 through 100
Low Pressure available in sizes 12 through 36
* Blue text is speciﬁc to direct drive model QEID only