Energy Recovery with Cooling and Heating
VersiVent - Model VER
• Commercial • Institutional
• 2,000 - 10,000 cfm
• 3.0 in. wg external static pressure
• Configurable
September
2008
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The VersiVent Model VER Advantage
One Unit for Your Ventilation Needs
The need for energy recovery in the HVAC market is being highlighted by increased outdoor air requirements,
along with the attention to energy costs through LEED initiatives and ASHRAE guidelines. Increased ventilation
rates in combination with energy recovery products will improve your indoor air quality (IAQ) without the
associated costs of conditioning outdoor air. Greenheck’s VersiVent air-to-air energy recovery model continues
our leadership in the industry by supplying equipment that promotes productive and healthy environments.
The semi-custom configuration of the VersiVent offers the quality construction, flexibility and performance found
in a custom unit, without the cost or lead-time. With a variety of standard and optional accessories, the VersiVent
has been designed to meet your application needs.
VersiVent (model VER) ADVANTAGE
• Up to 10,000 cfm and 3 in. wg external static pressure
• Multiple wheel choices for:
Most economical
Best effectiveness
Best RER (Recovered Energy Ratio)
• Multiple heating and cooling options
Cooling: Chilled Water, Split System DX and Packaged DX with R410a refrigerant
Reheat: Modulating Hot Gas Reheat (DX), Wrap-Around Heatpipe
Heating: Hot Water, Electric and Indirect Gas Furnace
• Standard 2 in. double-wall construction
• Centrifugal airfoil wheel supply fan, model QEP
Why Use Energy Recovery?
• Energy Savings = Quick Payback
When a total energy recovery wheel is implemented in an HVAC system, it provides both initial cost savings by
cutting cooling tonnage and also annual savings by preconditioning the outdoor air. Combining these two cost
saving features leads to an attractive payback on these units. Energy recovery units should be viewed as an
investment and not just another piece of HVAC equipment.
• Improved Indoor Air Quality (IAQ)
Introducing fresh, outdoor air to a building
is a key component to sustaining excellent
IAQ. Preconditioning outdoor air with the
VersiVent (model VER) energy recovery
unit offers an economical approach for
providing high rates of outdoor air.
• LEED Credits
For Green Building designs, the VersiVent
offers an excellent way to acquire credits
in both the Energy and Atmosphere (EA)
and Indoor Environmental Quality (EQ)
categories towards a LEED certification.
• Adhering to ASHRAE Guidelines
ASHRAE Standard 90.1 provides design
guidelines regarding when it is most beneficial to use energy recovery. Depending upon your geographic
location, and the percentage of outdoor air in the application, ASHRAE recommends when to use energy
recovery. An important part of this guideline is that when energy recovery is recommended, the device should
be a minimum of 50% total (sensible and latent) effectiveness according to AHRI 1060 testing procedure.
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The Greenheck Advantage
Greenheck takes pride in offering a high quality, reliable product. We invest much of our
resources into designing, testing and manufacturing products to ensure customer satisfaction.
VersiVent Product Features
High Performance Polymer Wheel
• Polymer base with silica gel desiccant bonded into the material for over 75% total effectiveness
• Moisture transfer capabilities are maintained and will not lessen with repeated cleaning
• Lightweight and segmented for easy maintenance
Extensive Testing and Industry
Certification
• ETL listing for electrical and overall unit safety
• AHRI Certified Energy Wheels
• AMCA Licensed Fans and Dampers
Quality and Consistency
in Manufacturing
Greenheck utilizes an efficient,
automated manufacturing
process that maintains
Greenheck’s consistent high
standard of quality.
Wheel Performance
Options
Loose Wrap Density
Tight Wrap Density
RER (Recovered Energy Ratio): The ratio of energy recovered by the
energy recovery wheel to the energy expended in the recovery process
Every unit is tested at the factory before it is
shipped to the jobsite.
Energy recovery wheels are certified by the AHRI
Air-to-Air Energy Recovery Ventilation Equipment
Certification Program in accordance with AHRI
Standard 1060. Actual performance in packaged
equipment may vary.
Certified ratings are available in the Certified
Products Directory. Visit www.ahrinet.org and click
the Find Certified Products link.
Standard
Wheel Depth
Good RER Excellent Effectiveness
Economical Choice Best RER
Good Effectiveness Best Effectiveness
Economical Choice Excellent RER Value
High Performance
Wheel Depth
Leading Edge Service and Support
Our products are supported by the industry’s best product literature, electronic media,
and Computer Aided Product Selection (CAPS) program. You’ll also find this information
on our Web site at www.greenheck.com
Our national and international representative organization provides personal service
and expertise. To locate your nearest Greenheck representative, call 715-359-6171
or visit our Web site at www.greenheck.com
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VersiVent—Designed to Meet Your
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Application Needs
The VersiVent model VER comes with a multitude of options and accessories to meet your
application requirements.
Plenum Supply Fan
2
• Backward inclined airfoil centrifugal
wheel
• L10 80,000 hour bearings
• Third-party certified blower for sound &
air performance
• 1-inch spring isolation
• 12 bladed design for quiet operation
Double-Wall Construction
3
• 2-inch insulation secured in
place between solid inner
and outer panels
• Insulation density of
1.5 lbs/cu. ft.
Pre- and Post-Filters
4
• MERV 8 pre-filters in
outdoor airstream and
return airstream
• MERV 8 or MERV 11 postfilters
Total Energy Wheel
1
• Sensible & latent energy recovery
• Lightweight, segmented wheel for easy
cleaning with rated L10 bearing life in
excess of 400,000 hours
• Permanently bonded, silica gel desiccant
for latent transfer — long term durability
• Stainless steel housing
(Smaller cabinet sizes will have a single wheel only)
8
2
Hinged Access Doors
• Provides access for
maintenance
• Easy lift-off removable doors
(Not shown)
Control Center
• Blower motor starters
• Wheel motor contactor
• Disconnect switch with
single point wiring
• Low voltage terminal strip
are provided
(Not shown)
Weatherhood
5
• Louvered intake hood that meets AMCA
500L for wind driven rain penetration
• 2-inch aluminum mesh filters (mist
eliminating)
• Exhaust hood with integral backdraft
damper
Control Center
Weatherhood
7
Variable Frequency Drives
• Fully programmed, variable
frequency drive (VFD) for the
supply and exhaust blower
motors that vary airflow
• Fully programmed VFD for
energy wheel control
(Not shown)
4
4
Product Features
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Standard Feature
S
Optional Feature
O
1
Additional Accessories
• Factory mounted sensors
(temperature, pressure, amp)
• Dampers - internally mounted
• Frost control
• Economizer control (stop
3
5
1
wheel or modulating wheel)
• Roof curbs
• Painted exteriors
• Rotation sensor
• CO2 sensor
• Dirty filter sensors
(Not shown)
4
6
9
Cooling Options
6
• Packaged direct expansion [PDX] (shown)
• Chilled water coils
• Split DX coil (coil only, R-22 or R-410a
refrigerant)
• All coils with copper tubes with permanently
expanded aluminum fins
• Mounted on a stainless steel drain pan
Drain Pan
PDX & Hot Gas Reheat Coils
Heating Options
9
• Hot water coils
• Indirect gas (IG)
furnace
• Electric heater
Condensing Fans (PDX only)
8
• Direct drive
• Statically and dynamically balanced
• Dual condensing fans
• Head pressure control -- improves
efficiency
Compressors (PDX only)
7
• Quiet running hermetic, scroll-type
• 7-31 Tons of mechanical cooling
• 2 circuits -- better temperature
control
Reheat Options
• Wrap-around heatpipe
• On/off hot gas reheat
• Modulating hot gas reheat
- ON/OFF hot gas reheat coil coupled with a
modulating bypass damper
- Uses recycled energy to reheat the air
(Not shown)
5
5
IG Heater
Compressors
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Applications
Typical Applications for Energy Recovery
Animal Shelters Bars and Clubs Churches Dormitories
Locker Rooms Nursing Homes Office Buildings Printing Shops
Restaurants Schools Function Halls Casinos
Veterinary Hospitals
100% Outdoor Air System
The VersiVent unit can be utilized as a 100% outdoor air unit. By combining the benefit of the total energy wheel,
with supplemental heating and cooling, the model VER is an energy-efficient method of delivering conditioned
outdoor air to a space. In this application the model VER is tasked with all of the air tempering for the space.
Benefits
• 75% energy recovered from exhaust air
• Good humidity control
LARGE SPACE
Dedicated Outdoor Air System
A Dedicated Outdoor Air Unit, the VersiVent (model
VER) supplies conditioned, outdoor air to several
zones in a building. The supplemental cooling on the
model VER should be sized to handle the outdoor air
ventilation load, along with the space latent load. In
each zone, a separate air handling unit performs
sensible-only comfort heating and cooling.
Benefits
• Minimum total supply airflow while maintaining
good IAQ
• Lowered Energy Costs
• Good humidity control
SUPPLY AIR
RELIEF AIR
EXHAUST
OUTDOOR AIR UNIT (OA unit)
WITH ENERGY RECOVERY
72°F
65%
AIR
OUTDOOR
AIR
AIR HANDLING
UNIT (AHU)
Cooling
Coil
Heating
Coil
RETURNING AIR
CLASSROOM
ZONE 1
AHU
SUPPLY AIR
CLASSROOM
72°F72°F
ZONE 2
RELIEF AIR
EXHAUST
AIR
OUTDOOR
AIR
EXHAUST AIR
RESTROOM
OUTDOOR AIR UNIT (OA unit)
WITH ENERGY RECOVERY
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Dimensions & Weights
Unit Size A B C D* E F G H I W L*
1
D
VER-45 15.7 28.1 44.6 30.2 36.2 44.2 50.3 36.3 47.6 64.0 66.5 19.0 70.0
VER-65 15.7 30.9 46.6 30.2 36.2 44.2 50.3 38.1 47.6 66.0 72.8 23.8 76.2
VER-90 15.7 34.9 85.6 30.2 36.2 44.2 50.3 41.3 47.6 66.0 66.6 25.3 91.0
All dimensions are shown in inches.
L*: Please sum the lengths of the appropriate modules to get the total length of the unit.
Model VER-45 VER-65 VER-90
Unit CFM Range
Motor HP
External Static
Pressures (in. wg)
**Weights (lbs) 4900 6300 7250
**The weights shown are a worse case scenario based on the sheet metal and component
weights for the unit. These weights include sheet metal weights added together with the largest
fans, coils and heaters for the unit.
Min 2000 4000 6000
Max 5000 7000 10000
Min 1.5 3 5
Max 7.5 15 20
Min 0 0 0
Max 3 3 3
2
D
3
D
4
D
D*: Coil Module Options
1
D
HW HW + DX CW + HP HW + CW + HP
CW HW + CW DX + HP HW + DX + HP
DX EH + CW DX + HGRH EH + DX + HP
EH EH + DX DX + HW + HGRH EH + CW + HP
2
D
DX + EH + HGRH
3
D
HW=Hot Water
CW=Chilled Water
DX=Direct Expansion
EH=Electric Heat
HGRH=Hot Gas Reheat
HP=Wrap-around Heat Pipe
4
D
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Greenheck’s Energy
Recovery Models
Model MiniVent - Energy Recovery Ventilator
The MiniVent-450 & 750 are energy recovery ventilators used
for commercial and institutional applications that require 300
to 800 cfm of ventilation air. The compact design provides an
economical solution for individual spaces, such as school
classrooms and small offices.
Model ERV/ERVe - Energy Recovery Ventilator
Low first-cost and maximum energy savings combine to yield
an extremely attractive payback on Greenheck Energy Recovery
Ventilators. By incorporating ERV’s into the HVAC system, air
conditioning and heating equipment can be downsized. Energy
recovery ventilators are perfectly suited to help control humidity.
In the summer, when outdoor humidity is high, the energy wheel
dehumidifies the outdoor air. This greatly reduces the latent load
on the air conditioning equipment and also eliminates rising indoor humidity levels that can occur in
hot, humid climates. In the winter, when outdoor air is dry, the energy wheel humidifies the air. This
increases comfort and reduces the amount of humidification required. Capacities for model ERV
range from 400 to 12,000 cfm with external static pressure capabilities to 1.5 in. wg. Capacities for
model ERVe range from 1,000 to 6,000 cfm with external static pressure capabilities to 1.0 in. wg.
Model ERCH - Energy Recovery with Cooling and Heating
The model ERCH combines the benefits of the total energy wheel with
supplemental cooling and heating. The result is a product that is specifically
designed to process 100% outdoor air to desired supply conditions. Four
housing sizes provide airflow capacities from 1,000 to 10,000 cfm with external
static pressures to 1.5 in. wg. A variety of tempering options are available. The
coil section of the ERCH accommodates a cooling coil, a heating coil, or both.
Model VER - Versatile Energy Recovery
The Model VER is a fully featured, versatile energy recovery unit with a wide
range of heating and cooling options available. The unit includes an energy wheel
to pretemper the outdoor air which reduces the heating and cooling equipment
needed, while also lowering operational costs. In addition to the standard heating
and cooling options, the VersiVent has options such as environmentally friendly
R410a refrigerant, a wrap-around heat pipe for additional dehumidification and
reheat capacity, and a quiet, efficient, plenum supply fan. Capacities range from
2,000 to 10,000 cfm with external static pressure capabilities to 3 in. wg.
Model APEX - Affordable, Practical, Energy Exchanger
The APEX combines high airflow capacities with cost-saving energy recovery
ventilation by providing centralized outdoor air distribution and reducing the
need for multiple unit installations. Fresh outdoor air is preconditioned by the
total enthalpy wheel, which recovers a majority of the energy from the exhaust
air. It saves 3-4 tons of cooling per 1,000 cfm and saves 50-60 MBH of heating
per 1,000 cfm. Easy to install and operate with airflow capacities that range
from 10,000 to 20,000 cfm and external static pressures to 2.5 in. wg.
Our Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one
year from the shipment date. The energy recovery wheel is warranted to be free from defects in material
and workmanship for a period of five years from the shipment date. Any units or parts which prove defective
during the warranty period will be replaced at our option when returned to our factory, transportation
prepaid. Motors are warranted by the motor manufacturer for a period of one year. Should motors furnished
by Greenheck prove defective during this period, they should be returned to the nearest authorized motor
service station. Greenheck will not be responsible for any removal or installation costs.
As a result of our commitment to continuous improvement, Greenheck reserves the right to change
specifications without notice.
Greenheck P.O. Box 410 • Schofield, WI 54476-0410 • Phone (715) 359-6171 • greenheck.com
Copyright © 2008 Greenheck Fan Corp. • VersiVent, Rev. 2, September 2008 RG (00.TAP.1009 R2 9-2008)
Prepared to Support
Green Building Efforts
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