MODULAR AIR HANDLING UNITS,
SELF-CONTAINED UNITS, & WATER-SOURCE/
GEOTHERMAL HEAT PUMPS
M2
Features:
• 1,200 to 21,600 cfm with overlapping
cabinet sizes for application exibility
• Double wall rigid polyurethane foam
injected panel construction reduces air
leakage and dampens resonated sound
• Direct expansion (DX) or chilled water
cooling
• Air-source heat pumps available with or
without factory installed gas, electric,
hot water, or steam heating for dual fuel
applications
• Water-source heat pump module for a
packaged heating & cooling system
• Backward curved plenum supply fans
• Power return, power exhaust, and energy
recovery wheel congurations
• Service access doors with removable pin
hinges and lockable handles
• Labeled components for quick and easy
installation
• Matching condensing units available for a
complete split system solution
Series
Makeup Air Applications
Up to 100% Outside Air
Application Flexibility
Minimizes Installation Time and Reduces Cost
Dehumidification and Premium
Filtration Capabilities
A Wide Variety of Factory
Installed Features
Comfort or Process Heating
and Cooling
M2
Series
Modular Air Handlers
AAON M2 Series air handling units provide
an ideal solution for new and replacement
applications with its modular construction
and premier factory installed features. The
serviceability, quiet operation, reliability,
premium eciency, and rugged construction
allow M2 Series air handling units to
expertly t the needs of your specic job
requirements. These units reect the proven
reliability and engineering excellence from
AAON, the premier manufacture of heating
and cooling products.
Superior Features
• Double wall rigid polyurethane foam injected panel construction
with thermal break reduces air leakage, dampens resonated
sounds, increases thermal resistance, and oers a cleanable air
tunnel ideal for demanding indoor air quality applications.
• Backward curved plenum supply fans are quieter, more energy
ecient, and handle higher static pressure applications than
forward curved supply fans.
• Units can be shipped factory assembled or shipped as individual
modules to meet the installation demands of any application.
• Double-sloped, stainless steel drain pans eliminate standing water
which can support microbial growth and prevents corrosion that
can lead to water leaks and contaminants in the air stream.
• Removable pin hinges, lockable zinc cast handles, and slide out
access to coils and energy recovery wheels provide easy access for
maintenance and cleaning when required.
• Multiple base heights are available that allow ease of installation
and can eliminate the need for a housekeeping pad for condensate
drain trap.
• Labeled electrical components and color-coded wiring match the
unit specic color-coded wiring diagram that is laminated and
permanently axed inside the control compartment.
• Factory run test report, wiring diagram, and Installation, Operation,
and Maintenance manual with startup form are provided in the
control compartment of every unit.
M2
H
L
W
Model
005 2,000
008 3,200 44
011 4,400
014 5,600 54
018 7,200
022 12,500 54
026 14,500 64
032 16,000
036 18,000
Nominal
cfm
*Dimensions may vary depending on options selected. All dimensions are in inches.
Maximum cfm may be 30-50% greater than nominal cfm.
Width* Height* Length
50
62
84
96 70
32
48
Length varies
48
depending on
options selected.
M2
Modular Air Handlers
Series
Premier Options
• Available for Constant Volume, Variable Air Volume (VAV), Single Zone
VAV, and Makeup Air applications with up to 100% outside air.
• Water-source or geothermal heat pump congurations with 10-100%
variable capacity compressors for a packaged indoor system and
energy ecient heating.
• Factory installed total or sensible AAONAIRE energy recovery wheels.
• Modulating Hot Gas Reheat humidity control for precise humidity
control necessary to maintain occupant comfort without the
temperature swings common with on/o reheat systems.
• Modulating gas heat with 5:1 turndown and either natural or
LP gas applications with open or separated combustion.
• SCR (Silicon Controlled Rectier) electric heat control for reduced
power consumption, longer heater life, and improved occupant
comfort.
• Multiple high eciency ltration options with up to MERV 14
eciency rating are available with or without monitoring devices.
• Multiple corrosion protection options including 6,000 hour salt spray
tested polymer e-coated indoor coils, CuNi coaxial or SMO 254 brazed
plate refrigerant-to-water heat exchangers, and 2,500 hour salt spray
tested interior and exterior corrosion cabinet protection.
• ECM (Electronically Commutated Motor) driven or VFD controlled
backward curved plenum supply fans for precise air ow control and
reduced power consumption.
• Fixed Plate Heat Exchanger Energy Recovery saves heating and
cooling energy and features extremely low cross contamination. Both
sensible and enthalpy cross-ow heat exchangers are available and
have no moving parts.
Application Flexibility
Available Modules
Fan Module
Filter Module
Mixing Box Module
Heating Module
Cooling Module
Blank Module
Controls Module
Energy Recovery Module
Water-Source Heat Pump Module
M2 Series Unit with Exterior
Corrosion Protection
M2
Series
Modular Air Handlers
Indoor Air Quality Features
• Drain pans are sloped to ensure positive drainage and
constructed from stainless steel to provide resistance to
corrosion.
• The cabinet interior metal liner is cleanable, and easily
wiped down. The use of foam paneling rather than
berglass insulation eliminates the potential for trapping
dirt or moisture in the interior of the air handler.
• Access to the unit interior for maintenance is made
easy with standard hinged doors that open against
pressure. Adhering to the unit’s maintenance schedule
is an important element in combating mold growth and
maintaining indoor air quality.
• Cabinet composite panel construction allows M2 Series
to oer a low air leakage rate and aid minimizes the
inltration of unconditioned air.
• Multiple ltration options including pleated or cartridge
lters up to 95% eciency (MERV 14) in a prelter
position, nal lter position, or a combination of both
positions.
Energy Efficiency
The M2 Series standard backward inclined plenum fans are more energy ecient, quieter,
and can handle higher static pressures, and are easier to clean than comparable forward
curved blowers. A clean fan not only requires less energy than a dirty one, but also maintains
capacity and reduces stress on the unit.
AAON rigid polyurethane foam injected composite construction provides more than twice
insulating value of 1/2 lb./ft3 density berglass insulated construction. Two inch AAON
foam insulated construction provides a thermal resistance of R-13 and one inch AAON foam
insulated construction provides an R-6.5.
M2
Modular Air Handlers
Series
M2 Series Features
Acoustical Features
When compared with single wall cabinet construction, the M2 has greater
sound insulation capabilities due to the composite paneling.
Additionally, vibration isolation mounts are available for fan and motor
assemblies to minimize undesirable noise.
Control Features
AAON pre-engineered factory installed controls are tested to ensure
consistent quality, and reduce eld labor costs associated with development
and installation of unique control strategies.
AAON also features factory installed customer provided control, allowing the
customer to specify the type and manufacture of unit controller. This exibility
allows the unit to match an existing building control architecture.
Energy Recovery Wheel
The AAONAIRE is an energy recovery wheel, capable of transferring
sensible and latent energy from the incoming air stream to the exhaust and
preconditioning the supply air. This saves energy by reducing mechanical
heating and cooling use, and also lowers costs by increasing eective
system capacity by 30% or more which allows smaller equipment to be
selected. Energy recovery wheels are also available as sensible only and with
mechanical purge that reduces carryover to less than 1%.
Polymer E-Coated Coils
A uniformly thick polymer coating is applied to the entire coil by an immersion
process that minimizes the potential for gaps in coverage that may occur with
spray coating. The polymer coil coating provides corrosion protection for
more than 6,000 hours in salt spray testing, while maintaining the thermal
performance of the coil.
Modulating Hot Gas Reheat
This system delivers only the amount of reheat required for space comfort, providing precise
dehumidication without overcooling the space. Occupant comfort is uniform and consistent;
drastic temperature swings common to on/o type reheat systems are eliminated.
AAONAIRE
Heat Recovery Unit (HRU)
• SENSIBLE AND LATENT HEAT
AAONAIRE HRU With:
• DX or CW Cool
• HW, Steam or Electric Heat
AAONAIRE HRU With:
• DX or CW Cool
• HW, Steam or Electric Heat
• OA/RA Mixing
• RA Bypass
AAONAIRE HRU With:
• DX or CW Cool
• HW, Steam or Electric Heat
• OA/RA Mixing
ENERGY RECOVERY WITH AAONAIRE
M2 Series Typical Congurations
The AAON M2 Air Handling Unit Modules provide design exibility and ease to meet job application requirements.
EQUIPMENT
Filter
and Fan
Blow
Through
Draw
Through
Supply
Filter
Mixing
Mixing
Fan
Supply
Fan
Filter
Filter
Supply
Fan
Heat / Cool
Heat / Cool
Supply
Fan
TYPICAL APPLICATIONS
EQUIPMENT RESULT
Chilled Water
Hot Water
DX
Electric Heat
Steam
Reheat
WSHP
Bypass
Heat and Cool
COMFORT OR PROCESS
TEMPERATURE CONTROL
Humidity Control
MODULATING HOT GAS
Water-Source
Heat Pump
GEOTHERMAL
Air Quality
RETURN AIR
OUTSIDE AIR
UP TO 100%
Top
Discharge
Mixing / Filter
Shipping
Splits
Mixing
*
Each of the available configurations can be shipped with individual modules for field
assembly to accommodate renovation and replacement jobs with tight installations.
Filter
Heat / Cool
Heat / Cool
Supply
Fan
Supply
Fan
SPECIAL APPLICATIONS
EQUIPMENT RESULT
Preheat
Preheat
Bypass
Face
Fixed Plate
HOT WATER,
STEAM OR
ELECTRIC
Face and Bypass
HOT WATER OR
CHILLED WATER
SPECIAL TEMPERATURE
AND HUMIDITY CONTROL
Fixed Plate
Energy Recovery
SENSIBLE AND
LATENT HEAT
Power
ENERGY RECOVERY WITH AAONAIRE
Exhaust
Filter
AAONAIRE
Heat Recovery Unit (HRU)
• SENSIBLE AND LATENT HEAT
AAONAIRE HRU With:
• DX or CW Cool
• HW, Steam or Electric Heat
AAONAIRE HRU With:
• DX or CW Cool
• HW, Steam or Electric Heat
• OA/RA Mixing
Filter
Power
Exhaust
Filter
Power
Exhaust
Heat
Wheel
Heat
Wheel
Heat
Wheel
Supply
Fan
Filter
Heat/Cool
Filter
Supply
Supply
Fan
Fan
AAONAIRE HRU With:
• DX or CW Cool
• HW, Steam or Electric Heat
• OA/RA Mixing
• RA Bypass
Filter/
Vertical
Damper
Power
Exhaust
Filter
Heat
Wheel
Horizontal
Damper
Vertical
Damper
Vertical/
Horizontal
Damper
Heat/Cool
Blank Access
Heat/Cool
Supply Fan
Filter/
Vertical
Damper
Vertical/
Horizontal
Damper
Supply Fan
AAON Environmentally Friendly HVAC Product Family
Custom & Cataloged
Air Handling Units
(800-200,000+ cfm)
Heating and Cooling for...
Condensers & Condensing Units
(2-230 tons)
Chillers (Air-Cooled &
Evaporative-Cooled)
(5-540 tons)
Rooftop Units
(2-240 tons)
Outdoor Equipment Rooms
(Chillers, Boilers, & Pumps)
Self-Contained Units
(3-70 tons)
Residential Systems
(2-5 tons)
Auditoriums
Convenience Stores
Health Clubs
Healthcare Facilities
Homes
Lodgings
Manufacturing
Museums & Libraries
Natatoriums
Ofce Buildings
Restaurants
Retail Stores
Schools
Supermarkets
Geothermal & WSHP Units
(2-230 tons)
Air-Source Heat Pumps
(2-230 tons)
Heating and Cooling Coils
(Booster, Hydronic, & DX)
Dening Quality. Building Comfort.
2425 S. Yukon Ave.
Tulsa, OK 74107-2728
www.AAON.com
Fluid Coolers
(50-450 tons)
It is the intent of AAON to provide accurate and current product information. However, in the interest of product improvement, AAON reserves
the right to change pricing, specications, and/or design of its product without notice, obligation or liability. Copyright © AAON, all rights
reserved throughout the world. AAON® and AAONAIRE® are registered trademarks of AAON, Inc., Tulsa, OK.
M2 • R43020 • 140827
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