Greenheck QEI-16 User Manual

Mixed Flow Fans

Models QEI and QEID

Belt and Direct Drive

April

2010

Quiet & Efficient, Inline

Mixed Flow Fan—QEI & QEID

Mixed flow inline fans can be used with clean air
for supply, exhaust, or return air installations. Our
patented design excels in commercial applications
where low sound is critical. In addition, the Models
QEI / QEID are more efficient than comparably
sized tubular centrifugal and vane axial fans, thus
reducing the required motor horsepower and lowering
operating costs.

The Models QEI and QEID 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 and outlet) and Air Performance Seal.

• The QEI & QEID are UL/cUL 705 Listed for electrical,
UL Emergency Smoke Evacuation and UL 762
Restaurant Grease Exhaust (UL Listings optional).

• All sizes are operated and vibration tested before
they leave the factory to ensure trouble free
operation at the job site.

• Compact size and “Universal Mounting System”
make tight space considerations and last minute
mounting changes easy to handle at the job site.

• The QEI uses air handling quality bearings that are
100% inspected for swivel torque, noise levels, and
bore tolerances.

• Greenheck subjects these products to extensive life
testing, assuring you that the fans will provide many
years of reliable performance.

Model QEI – Belt Drive

• 17 sizes available (9 thru 60)

• Two classes of construction

• Volume Range: 500 - 115,000 cfm
(850 - 195,386 m

• Static Pressure: Up to 8.5 in. wg (2120 Pa)

Patented (QEI/QEID): USA Patent No. 7048499

China (P.R.) Patent No. CN1294361C
Mexico Patent No. 243465

3

/hr)

Model QEID – Direct Drive

• 15 sizes available (12 thru 54)

• 50 - 100% wheel widths

• Volume Range: 800 - 83,000 cfm
(1,360 - 141,000 m3/hr)

• Static Pressure: Up to 10.5 in. wg (2370 Pa)

Typical Mixed Flow Applications:

The models QEI and QEID are recommended for any
ventilation application that requires low sound and
high efficiency.

• Office Buildings • Parking Garages

• Concert Halls • Libraries

• Educational Facilities

Greenheck Fan Corporation certifies
that the Models QEI and QEID Mixed
Flow Inline fans shown herein are
licensed to bear the AMCA seal.
The ratings shown are based on
tests and procedures performed in
accordance with AMCA Publication
211 and AMCA Publication 311 and
comply with the requirements of the
AMCA Certified Ratings Program.

For QEID performance pages showing AMCA licensed
data for sound and air performance, please refer to
the QEID Sound and Air Performance Supplement
found on our Web site at www.greenheck.com.

See page 10 for details.

2

All Greenheck products are
supported by the industry’s
best product literature,
electronic media, and
Computer Aided Product

Selection program (CAPS).
You’ll also find extensive product and Installation and
Operation Manual (IOM) information on the Internet.

And, of course, you can always count on the personal
service and expertise of our national and international
representative organization. To locate your nearest
Greenheck representative call 715-359-6171 or visit
our Web site at www.greenheck.com

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 in
flange mounts. Bearings are selected with a basic
rating fatigue life (L
excess of 80,000 hours (L
maximum operating speed.

), per ABMA standards, in

10

at 400,000 hours ) at the

50

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

Inlets and outlets are designed with extended collars
for slip-fit duct connections as standard.

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
with NEMA 254T frame size motors and larger also
have extended lubrication lines for lubricating the
motor bearings. Smaller frame sized motors are
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. outdoor, 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.

*Model code applies to belt and direct drive, however, the code identified with blue text is
specific to direct drive model QEID.

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

Belt Drive

Direct Drive

Fan Size

9, 12, 15, 16, 18, 20,
22, 24, 27, 30, 33, 36,
40, 44, 49, 54, 60

Belt Drive available in sizes 9 through 60

Direct Drive available in sizes 12 through 54

Fan Class

I or II

Percent Wheel Width

50 through 100

Motor Horsepower

4 = ¼ 30 = 3 300 = 30
3 = 50 = 5 400 = 40
5 = ½ 75 = 7½ 500 = 50
7 = ¾ 100 = 10 600 = 60
10 = 1 150 = 15 750 = 75
15 = 1½ 200 = 20 1000 = 100
20 = 2 250 = 25

3

RPM

A = 1770 C = 870 J = 1425 M = 3600
B = 1170 F = 690 K = 950

33

Value Added Features

Vibration Testing

Before shipment, every mixed flow fan is vibration tested as a complete assembly. The maximum allowable
vibration on a QEI at the fan bearings is 0.15 in/sec. peak velocity, filter-in, for the specified fan RPM. QEID
maximum vibration is 0.08 in/sec. peak, filter-in, on the fan housing for the specified RPM. A record of any
vibration test result is available upon request.

By performing the vibration test, we are
able to provide more than simply trim
balancing; it is also a diagnostic tool
for finding potential problems. A
defective bearing or motor, bent
shaft or misaligned sheaves
may cause excessive vibration.
A complete vibration test will
find these problems before
the fan leaves the factory.

Electrostatic Powder Coatings

Powder coatings offer a uniform, durable and high-quality finish.
Standard powder coating is a one-coat process applied over
a phosphatized surface that generally meets or exceeds the
corrosion resistance of a comparable wet paint.

Greenheck offers a number
of in-house coatings applied
via “electrostatic powder.” The
standard coating, Permatector™, is
excellent for indoor or outdoor applications
and is resistance to many common chemicals. Consult
Greenheck’s Product Application Guide, Performance
Coatings for Ventilation Products, for a complete listing of coatings
and a relative resistance chart. For corrosive environments (i.e.
outdoor, coastal), see page 9 for information on our zinc-rich
basecoat technology.

Maintenance / Serviceable Construction Advantages

The following value added features are incorporated into the design to allow for quick and easy field service.

QEI service advantages

• Bearing lubrication is performed through extended grease fittings located on the
outside of the fan housing.

• The entire shaft and bearing assembly can be removed as a single assembly from
the inlet end of the fan housing.

• An adjustable motor base is provided for tightening the fan belts.

QEID service advantages

• Grease lubrication on motor bearings is done through extended grease fittings
for NEMA motor frame sizes 254T and over. Smaller frame motors use sealed
bearings and are permanently lubricated.

4

Inlet and Outlet Sound Power Levels

All sizes and configurations 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.

Field Rotatable Housing / Compact Size

The QEI is designed to accommodate changing fan mounting
positions and motor orientation in the field. Mounting fixtures

are securely bolted to the fan casing and can be relocated to

reposition how the fan is installed or the motor orientated.

Flexibility in a motor’s location is important for easier access

and can determine where the unit will fit. Last minute design
changes or unexpected obstacles during installation are no

longer a problem.

The QEI and QEID were designed for compact size. Keeping

size to a minimum is important when fitting into tight spaces like

mechanical rooms or air handlers.

Patented (QEI/QEID)

USA Patent No. 7048499
China (P.R.) Patent No. CN1294361C
Mexico Patent No. 243465

AutoCAD® and 3-D Revit® Models

Slip-Fit Duct Connections

The inlet and outlet ends of the QEI and QEID are designed to

accept “slip-fit” connections. Often companion flanges are bolted

to the fan to provide a slip-fit connection for a flexible sleeve. This

extra step is now eliminated by directly attaching the flexible sleeve to

the duct and fan. This saves time and money in the installation process.

It is recommended to use a flexible sleeve connection instead of a rigid

duct connection.

The advantages of a flexible transition are:

• Decreased sound transmission in
the ductwork

• Flexible connections allow for minor
misalignment

• Accommodates the use of thrust
restraints to resist thrust loads

Scaled AutoCAD® drawings and Revit® models
are available through Greenheck’s Web
site or from the Greenheck CAPS program
which retrieves drawings and places them
automatically into a job folder.

5

5

Design & Performance

QEI
Typical Vane Axial
Typical Tubular Centrifugal

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.

Airflow Profiles

Axial Centrifugal Mixed Flow

Centrifugal

Mixed Flow

Axial

Static Pressure

CFM

Axial Fans: Straight through

nearly linear airflow.

Centrifugal Fans: Two 90°

deflections, before airflow
exits the fan.

Mixed Flow QEI Fan: Slight

airflow deflection from
straight through.

Sound and Efficiency

Sound power levels and fan efficiency are two very important factors when selecting a fan. There is a noticeable
difference between impeller types. The table and chart below compare the sound power (LwA) and the static
efficiency of the QEI wheel versus tubular centrifugal and vane axial inline fans. Over a wide range of operating
points, the QEI provides the quietest and most efficient selection.

Sound Power (LwA) Static Efficiency

Performance QEI Size

QEI

15,000 cfm

@ 1.0 in. wg

25,000 cfm

@ 2.0 in. wg

50,000 cfm

@ 4.0 in. wg

(Model comparisons based on similar outer tube diameters.)

24 90 dB 100 dB 103 dB 43% 17% 34%

36 86 dB 93 dB 102 dB 68% 45% 56%

49 92 dB 98 dB 111 dB 71% 60% 59%

Lower Sound Power, Better Sound Quality

Sound power levels shown at each frequency:

Typical Tubular Centrifugal Typical Vane Axial QEI

100

90

80

70

Sound Power, dB

60

62 125 250 500 1000 2000 4000 8000

Frequency, Hz

Inline

Centrifugal

Vane
Axial

QEI

Inline

Centrifugal

Vane
Axial

The sound quality of the QEI is as beneficial to low sound
design as is the reduced overall sound power. The sound
chart compares units of similar outer tube diameters at an
operating point of 20,000 cfm with 1.5 inches wg of static
pressure (Ps). Tubular centrifugals (green) have dominant
tones in the 63 Hz through 250 Hz octave bands, while
vane axials (red) have more mid to high frequency sound.
The QEI (blue) does not have a dominant tone. A bystander
would hear a more bland sound that is quieter than a tubular
centrifugal or vane axial.

6

Wheel Characteristics

Static Pressure

CFM

50%
Wheel
Width

50% Wheel Width

100%
Wheel
Width

Intermediate
Wheel
Widths

50%
Wheel
Width

100%
Wheel
Width

Intermediate
Wheel
Widths

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.

Class II

Class I

Static Pressure

CFM

Direct Drive: Percent Wheel Width

Direct drive mixed flow fans are optimized for performance requirements by the use of partial wheel widths. This
is necessary because the fan RPM is commonly fixed and identical to the motor RPM. A reduction in the width
of the wheel (or the air passage) results in reduced airflow capacity and a steeper fan curve. This is similar to
the effect of a reduced pitch in a direct drive vane axial fan. QEID wheels are available in 5% increments from
50 - 100% wheel width.

QEID fans are commonly used in conjunction with variable frequency drives (VFD’s) for variable air volume
(VAV) systems. In these applications, the wheel width is optimized to ensure efficient operation and stable
performance throughout the turndown range. VFD’s are also used for final system balancing and to reduce the
airflow during initial phases of building construction. In this case, the fan and wheel width are selected using the
final design CFM and static pressure.

100%
Wheel
Width

50%
Wheel
Width

Static Pressure

50% Wheel Width

Sound Power versus Sound Pressure

The sound values displayed on the performance pages are in terms of inlet sound power (L
power (L

A). These values are the acoustic power radiating from the inlet and outlet of the fan, respectively.

Wo

Sound pressure, expressed as dBA, is the acoustic pressure at a point in space which can be measured with a
microphone or can be heard. To convert sound power (LwA) into sound pressure (dBA), the following corrections

are applied for a hemispherical free field.

dBA = LwA - correction

Note: Refer to AMCA Publication 303, Application of Sound Power Level Ratings for additional information on calculating typical sound pressure levels for fan installation.

Distance from Fan 3 ft. (0.9 m) 5 ft. (1.5 m) 10 ft. (3.0 m)

Correction 7 db 11.5 db 17.5 db

Intermediate
Wheel
Widths

CFM

100% Wheel Width

A) and outlet sound

Wi

7

Optional Features

Sure-Aire™

The Sure-Aire™ airflow monitoring station measures fan
flow within an accuracy of 2-3%. Unlike traditional flow
probes mounted in the fan venturi that create a system
effect hindering fan performance, the Sure-Aire™ does not
interfere with airflow and will not impact the fan’s air or
sound performance. This option is available on all QEI and
QEID 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 between the fan’s inlet and outlet to effectively isolate the fan from
the system. Vertical or horizontal mounting configurations are available.

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

• Can be used on both QEI and QEID through
size 27 fans

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

8

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

Attenuation Value (dB) 13 20 25 31 34 35 36 36

Optional Two Coat
Paint System

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 prior to
painting. Cleaner parts result in better coating adhesion and durability. We then use an advanced two coat
powder application method that includes a basecoat of zinc-rich powder and a topcoat of Greenheck’s
Permatector™ or Hi-Pro Polyester. The combination of these two topcoats over our new zinc-rich basecoat
results in the two new coatings Perma-Z and Hi-Pro-Z. These oven-cured coatings provide superior corrosion
resistance along with a tough, uniform finish to combat the most extreme conditions.

Zinc Advantage

When compared to a traditional single coat

One Coat Process

application, the benefits of the two coat
system include:

• An automatic powder coat application
that produces uniform coverage and
unmatched paint quality.

• A double coat thickness that provides
superior durability and protection from
air and water.

Two Coat Process

• A zinc-rich basecoat that includes
an epoxy component that provides
additional corrosion protection.

• A zinc-rich basecoat that provides
chemical protection of exposed steel
to prevent corrosion.

The protection offered by the zinc-rich basecoats in
Perma-Z and Hi-Pro-Z result in extraordinary corrosion
resistance. Test data demonstrates our two coat paint
system offers three (Perma-Z) and four (Hi-Pro-Z) times
the corrosion resistance of other coatings commonly
available within the fan industry. See table for salt spray
life for various coatings.

Coating fans with Perma-Z or Hi-Pro-Z has reduced our
customers annual paint maintenance costs by three to
four times!

For more information, see Greenheck’s Coatings for
Extreme Applications catalog, available on-line at
www.greenheck.com

Topcoat

2-3 mils

Topcoat

4-6 mils Total

Permatector™

Hi-Pro Poly

Perma-Z

Hi-Pro-Z

Baked Phenolic

Epoxy Phenolic

Fluorocarbon

Salt Spray ASTM B117 is a comparative test
that indicates the corrosion resistance of
powder paint coatings.

Standard

Surface Preparation

Base Steel

Zinc-rich Primer

(70% zinc)

Advanced

Surface Preparation

Base Steel

Salt Spray ASTM B117

Hours 1000 2000 3000 4000

99

Certifications & Listings

Tau Bot

psi

7880
7090
6300
5510
4720
3930
3140
2350
1560
770

-20

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. As an industry leader, Greenheck manufactures IBC compliant
seismic certified mixed flow fans that maintain structural integrity
during and after a seismic event.

How are Greenheck products seismically certified?

Our mixed flow fans are tested and certified using the most severe
seismic event that is found on the Spectral Response Map per IBC
Figures 1613.5 (1-2). Greenheck products are certified for use in all
seismic design categories (A through F), site classes and occupancy
categories, which means, regardless of location, a seismic rated
ventilation solution can be provided. The seismic analysis was
performed by third party professional engineers that hold professional
engineering licenses in all fifty states.

UL 705 Power Ventilator

QEI and QEID models are available with the UL/cUL 705 (Underwriters Laboratory) listing on a wide variety of 50
and 60 Hz motors. This listing ensures the use of UL approved electrical components.

Motors are available as either IEC (IP55) or NEMA (TEAO or ODP) designs. IEC design
motors are adjustable speed drive (ASD) compatible, have classF insulation and
are capable of wye-delta starting when over 5.5 kW. NEMA motors use across the
line starting with options for ASD compatibility. Motor (IEC or NEMA) using 50 Hz

power have a 1.0 service factor, while 60Hz

UL/cUL File #E40001
UL/cUL Listed Power Ventilator

power have 1.15 service factor. Design and
construction options for motors include
increased thermal insulation, overload
protection and extended motor leads.

Structural Finite Element Analysis of a

QEI in Seismic Design Category F

UL Emergency Smoke Evacuation

QEI and QEID models were tested and
rated for design time and temperature used
in emergency heat and smoke exhaust
applications.

UL/cUL File #MH17511
UL/cUL “Power Ventilators for Smoke Control Systems”

UL 762 Restaurant Exhaust

Inline grease exhaust fans are an excellent alternative
for kitchen applications when roof or wall mounted
ventilators are not practical. A QEI with UL 762 grease
option is designed to withstand the demands of high
temperature kitchen grease exhaust and high-pressure
duct washers.

A Tough Package to Beat

The QEI inline grease fan is tough to beat when packaged
with our full line of kitchen hoods and grease extraction
options. Take advantage of Greenheck’s expertise in
providing a total solution in kitchen ventilation equipment.

10

Model

Operating

Temperature

Time

Duration

ºC ºF Hours Comments

QEID 300 572 1

QEI 300 572 2

QEI 260 500 4

QEID 260 500 5

Consult your Greenheck representative for time and temperature
combinations other than those listed.

Per British Spec 7346

Per Industrial Risk
Insurers (North America)

UL 762 is concerned with fans designed
for removal of smoke and grease laden
vapors with airstream temperatures up

Listed Power
Ventilation for
Restaurant
Exhaust
Appliances
13G3 Maximum
Operating
Temperature
400°F.

to 400°F.

• Meets all UL 705 Requirements

• UL/cUL File #MH11745
“UL/cUL Power Ventilators for
Restaurant Exhaust Appliances”

• Bolted Access Door

• Drain Connection

• Meets requirements of NFPA 96

Ventilation Control and Fire Protection

of Commercial Cooking Operations

Belt Drive versus Direct Drive

Belt Drive Advantages

• Lower sound levels

• Higher operating efficiencies

• 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 frequency drive use).

High Efficiencies = Lower Operating Costs

Example of Annual Operating Cost Savings

For a system performance requirement of 25,000 cfm at 2.5 inches of static pressure (wg) the corresponding
operating power requirements are 13.97 Bhp with a QEI size 36 and 19.8 Bhp for a size 36 tubular centrifugal fan.

Formulas:

- Kilowatt-Hours = (Operating Power (Bhp) x 0.746 x Hours of Operation) / Motor Efficiency

- Operating Cost = Kilowatt-Hours x Power Cost per kW hour

Assumptions:

- Cost of electricity is $0.09 per kilowatt hour

- 3,120 annual hours of operation (12 hours per day, five days a week, 52 weeks a year)

- 93.0% motor efficiency (equal to NEMA Premium minimum efficiency for 15 and 20 hp, ODP, 1725 RPM motor)

Tubular Centrifugal Fan

kW-Hours = (19.8 Bhp x 0.746 x 3120) / 0.93 = 49,554
Operating Cost = 49,554 x $0.09 = $4,460

Annual Operating Cost Savings = $4,460 - $3,147 = $1,313

QEI - Mixed Flow Fan

kW-Hours = (13.97 Bhp x 0.746 x 3120) / 0.93 = 34,963
Operating Cost = 34,963 x $0.09 = $3,147

11

Belt Drive Mounting
Configurations

Sizes 9-27 (Universal Mounting)

Horizontal and Vertical Mounting
Configurations

QEI fans sizes 9-27 can be mounted horizontally or

Optional

Mounting

Rails

Fig. 1

Fig. 3

Vertical Ceiling Hung

Vertical Base Mount

Fig. 5

Fig. 2

Fig. 4

Optional

Mounting Rails

Optional

Mounting

Rails

Sizes 30-60

QEI fans sizes 30-60 are available in horizontal and vertical mounting
configurations. Lifting lugs are provided on horizontal fans for ease of

installation. Vertical units should be lifted by the mounting brackets.

vertically. For ease of installation, eight mounting brackets
are welded on each fan. These eight brackets along with
standard mounting supports provide for Greenheck’s
Universal Mounting System. Motor positions are viewed
from the discharge end.

Fig. 1 Horizontal Base Mount
Each fan is shipped as standard in this arrangement.
Motor at “A” position (12 o’clock) is standard.

Fig. 2 Horizontal Base Mount with motor at “C” or “G”

position (3 or 9 o’clock). A set of optional mounting
rails are recommended for this installation.

Fig. 3 Horizontal Ceiling Hung
In this installation the supports can be positioned for

mounting the motor at “A” or “E” (12 or 6 o’clock).

Fig. 4 Horizontal Ceiling Hung with motor at “C” or “G” (3

or 9 o’clock). A set of optional mounting rails are
recommended for this installation.

Fig. 5 Vertical Mount
Universal QEI fans can be mounted vertically (ceiling

hung or base mount) for either upward or downward
airflow. Optional mounting rails are suggested for
any vertical installation.

A

H

G

B

C

Horizontal Mounting

Horizontal mounting configurations, base mount or ceiling hung, are provided
with an identical support. The mounting configuration can be changed between
base mount or ceiling hung in the field. The motor position can also be field
rotated to any of the shown positions. Motor positions are viewed from the
discharge end.

Base Mount: Rigid steel base provides stable mounting to floor for the housing.

Motor Positions: A, B, C, G and H

Ceiling Hung: Suspend the fan horizontally from the ceiling.

Motor Positions: A, C, D, E, F and G

Mounting rails are recommended for horizontal installations with B, C, D, F, G
and H motor positions.

Vertical Mounting

Vertical mounting configurations, upblast or downblast, are provided with heavy
duty steel brackets welded to both ends. These brackets permit either floor or
ceiling mounting on the same unit. Optional mounting rails are suggested for any
vertical installation for sizes 9-27.

12

Horizontal - Base Mount

A

G

F

E

Horizontal - Ceiling Hung

Vertical

(Upblast shown)

D

C

Roof Upblast & Spark Resistant
Construction

Roof Upblast

Model QEI sizes 9 through 54 and model QEID sizes 12
through 54, are available in roof upblast configuration
for Class I and II construction. Roof upblast
configuration is ideal for exhausting contaminants
away from a building to prevent roof damage and re­entrainment of exhaust air. The QEI roof upblast has
the high temperature UL rating so it can be used for
emergency smoke exhaust applications.

Standard construction includes a fully-welded heavy­gauge curb cap to eliminate leaks, a butterfly damper
section for backflow prevention, and a windband
section to protect the butterfly dampers from debris. A
complete line of roof curbs is available for mounting to
a roof deck.

Spark Resistant Construction

Greenheck mixed flow fans are available with spark B
and C resistant designs suitable for applications that
involve flammable particles, fumes or vapors. Spark
resistant construction options adhere to guidelines
defined within AMCA Standard 99-0401-86.

The fan wheel is constructed of a
nonferrous material (aluminum).

Spark B

Spark C

A non-ferrous (aluminum) bearing
cover surrounds the driven bearing,
shielding it from the airstream.

The inlet cone is constructed of
non-ferrous material (aluminum).
A nonferrous (aluminum) bearing
cover surrounds the driven bearing
shielding it from the airstream.

13

Accessories

Motor Cover (Belt Drive)

A weatherproof motor cover shields the motor
components from dust, dirt and moisture for indoor
or outdoor installations. Motor covers also serve as a
personnel guards and meet OSHA standards.

Hinged Access Door

Hinged access doors provide an opening through the
fan housing for cleaning or visual inspection of the
wheel. Bolted access door is standard.

Extended Life Bearings (Belt Drive)

Air handling quality, flange mounted bearings meet a
basic rating fatigue life (L
excess of 200,000 hours (L
operating speed.

), per ABMA standards, in

10

at 1,000,000) at maximum

50

Copper Lube Lines

Copper lube lines can be used as a replacement
for standard nylon lube lines. Grease fittings allow
bearing lubrication without disassembling the fan or
while in operation. Fittings are mounted on the outside
of the fan housing. Available on all belt drive units and
direct drive units with NEMA 254T frame size motors
and larger.

Flanges

Inlet and outlet flanges with prepunched holes are
available for all fan sizes. These flanges, welded
to the housing, provide an easy means for bolted
connection to ductwork. Matching bolt-on companion
flanges are also available.

Disconnect Switches

Toggle type and heavy duty disconnect switches are
available for positive electrical shut-off and safety
when servicing fans. The following switches are
available to meet individual electrical requirements
and can be factory mounted or shipped loose for field
mounting.

• NEMA-1 General purpose

• NEMA-3R Rainproof

• NEMA-4 Watertight

• NEMA-7 & 9* Class 1 and 2 hazardous locations

*Greenheck will not factory mount NEMA-7 & 9 disconnect
switches.

Inlet and Outlet Guards

Removable inlet and outlet guards provide protection
for personnel and equipment in ducted or non-ducted
installations.

Extended Wiring (Direct Drive)

Electric leads from motor junction box are brought
out to exterior of unit. This provides an easy means of
connecting the motor to the electrical system.

Belt Tube (Belt Drive)

A totally enclosed belt tube isolates the belts and
drives from the airstream.

Sound Vault Housing

A totally enclosed galvanized enclosure that reduces
radiated noise levels. See page 8 for more details or
Sound Vault Housing brochure available on-line at
www.greenheck.com.

Mounting Rails (Belt Drive)

Mounting rails are used to provide a stable base when
the fan and motor center of gravity is overhung to one
side. They are recommended for horizontal mounting
when the motor is to be located in the 3 or 9 o’clock
position and also for all vertically mounted fans.

Isolators

Both base mount and hanging isolators are available
in either neoprene or spring mounts. The isolators are
sized to match the total weight of each fan.

Special Coatings

Special coatings are available for protective purposes.
Coatings are applied before assembly so that
each manufactured component is coated inside
and out. Painting the exterior a specified color for
appearance is also an option. Consult Greenheck’s
Product Application Guide, Performance Coatings for
Ventilation Products, for a complete list of coatings
available and their chemical resistance. Available on­line at www.greenheck.com.

Sure-Aire™ Flow Measurement

Sure-Aire™ provides the real-time flow measurement
for use in building automation systems. The
Sure-Aire’s noninvasive design is accurate to within
3% and does not impact fan performance. See page8
or our Sure-Aire Airflow Monitoring System catalog
available on-line at www.greenheck.com for additional
information.

14

Exploded View

Motor Cover

Inlet Guard

Inlet Flange

Companion Flange

Outlet Flange

Outlet Guard

Companion Flange

Bolted Access Door
(Standard)

Spring Base Isolator

Neoprene Base Isolator

Spring Hanging Isolator

Mounting

Rails

15

Direct Drive Selection Charts

The quick select charts below and on the following page are a convenient method for sizing the fan required for a
specific performance. Colored bands for a given size in each chart represent the entire operating range available
for that size and speed.

For QEID performance pages showing AMCA licensed data for sound and air performance please refer to the
Model QEID Sound and Air Performance Supplement found at www.greenheck.com

12

10

1770 RPM

(60 Hz)

Model QEID

12—33

Static

Pressure

(in. wg)

8

6

4

1170 RPM

(60 Hz)

Model QEID

15—49

Static

Pressure

(in. wg)

2

0

1 5 10 50 100

12

10

8

6

4

181615 3322 3027242012

Volume (cfm x 1000)

16

16

2

0

1 5 10 50 100

Volume (cfm x 1000)

49444036333027242220181615