Trane Dedicated Outdoor Air Systems Brochure

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Trane® Dedicated

Outdoor Air Systems

2

Achieving acceptable indoor air quality can be

difficult—especially when using some traditional

packaged rooftop HVAC systems. Many of

these systems don’t have the latent capacity

to effectively manage high humidity levels,

which can result in uncomfortable conditions

for building occupants—even when packaged

rooftop HVAC systems are operating at full

capacity and consuming high amounts of energy.

Adding a Trane® dedicated outdoor air system

can not only improve indoor air quality, but also

reduce HVAC operating costs. By cooling and

filtering outdoor air before directing an optimal

amount of it into a building, a Trane dedicated

outdoor air system can not only help maintain

compliance with ASHRAE 62.1 ventilation

standards, but also can decrease indoor humidity

and reduce the load on HVAC systems. The

result is improved occupant comfort and lower

utility bills.

Breathe easier with lower energy bills

Trane dedicated outdoor air systems can be

an energy-saving partner for your heating

and cooling system, allowing it to work more

efficiently. When incorporated as part of an

HVAC system’s total design, a Trane dedicated

outdoor air system can mean smaller, less-

expensive, more energy-efficient local or zone

terminal devices can be specified, saving money

on first costs. A Trane dedicated outdoor air

system can pay for itself in a short amount of

time, saving you money on first costs and utility

bills. And with a life span of up to 20 years or

more, you can expect a Trane dedicated outdoor

air system to save money on utility bills for a long

time to come.

Trane dedicated outdoor air systems:

Improving indoor air quality and lowering HVAC costs

High indoor

occupancy levels,

busy kitchens and

shower facilities can

significantly increase

indoor humidity

levels—which can

make occupants

uncomfortable.

33

Code compliance: Following regulations

with proper ventilation

Trane dedicated outdoor air systems are an ideal

way to ensure full compliance with ASHRAE

62.1 ventilation standards. Integrated with Trane

controls, Trane dedicated outdoor air systems

can precisely deliver the right amount of outdoor

air into your building, not only ensuring full

compliance with applicable building codes that

reference ASHRAE 62.1, but also meeting or

exceeding the air pressure specifications of your

building’s design. The benefits include:

• Avoiding monetary building code penalties

and/or mandated corrective action

• Mitigating the infiltration of high-humidity

outside air

• Having the capacity for increased ventilation

rates to meet future requirements

Indoor air quality: Improving the life of

your building, improving the life of its

occupants

Various factors can influence a building’s indoor

air quality (IAQ), including humidity, the presence

of contaminants and more. Good IAQ contributes

to occupant comfort—and comfortable building

occupants are less likely to have work absences,

can be more productive, and are more likely to

remain building tenants longer. Additionally, a

building with superior IAQ can deliver higher

rental income.

The benchmark method for improving a building’s

IAQ is the introduction of fresh outdoor air—but

unless that outdoor air is properly conditioned,

it can bring with it undesirable temperatures,

humidity and contaminants. Trane dedicated

outdoor air systems can be the single best

way to quickly and economically improve your

building’s IAQ by properly conditioning outdoor

air, controlling its humidity and filtering out

contaminants.

Humidity control—Trane dedicated outdoor

air systems contain a specially designed six-row

evaporator coil that can quickly dehumidify

incoming outdoor air—and is optimally

engineered to maximize both moisture removal

and energy savings.

Contaminant removal—Multiple types of

air filters are compatible with Trane dedicated

outdoor air systems to keep pollen, dust and

other outdoor air contaminants from entering

your building.

Microorganism control—Trane dedicated

outdoor air systems are available with a UV-C

band irradiation light to inhibit the growth of

microorganisms that otherwise could thrive on

the wet surface of an evaporator coil, keeping

them out of the air that passes through the

evaporator coil and into your building’s interior.

Trane dedicated outdoor air systems:

Improving indoor air quality and lowering HVAC costs

Comfortable building

occupants are less

likely to have work

absences, can be more

productive, and are

more likely to remain

building tenants

longer.

When outdoor air is excessively humid, an HVAC system is

immediately challenged to reduce that humidity. The problem

only gets worse when additional sources of indoor humidity are

added—which occurs when occupancy levels are high, or when

buildings incorporate rooms that naturally produce humidity,

like large kitchens and shower facilities. The result can be an

overworked HVAC system that consumes a lot of energy while

still failing to bring humidity levels within the ASHRAE 55/

Berglund recommended comfort zone.

Trane® dedicated outdoor air systems are specifically designed

to cool and dehumidify 100 percent outdoor air. Compared

to a system using a traditional packaged rooftop HVAC unit,

a system that incorporates a Trane dedicated outdoor air

system into its design not only can maintain required indoor

ventilation levels, but also can use significantly less energy.

That can be an enormous cost savings, since an HVAC system

can represent up to 60 percent of the energy use in a typical

occupied building.

Here’s how a Trane dedicated outdoor air system

can give your building higher indoor air quality

(IAQ) and lower utility costs.

• When outside air is humid, Trane dedicated outdoor air

systems use a chilled evaporator coil to dry that air to a

lower dew point before bringing it inside the building.

• Bringing outdoor air with a lower dew point inside

a building means significantly less air is needed for

dehumidification and to maintain optimum indoor

comfort—and smaller motors, compressors and

ductwork can be used.

- Smaller HVAC systems cost less to purchase, saving

money on the initial equipment investment.

- Smaller HVAC systems consume less energy, for lower

operating costs throughout the life of the system.

• By bringing 100 percent outdoor air into the building, a

Trane dedicated outdoor air system can easily meet or

exceed typical minimum ventilation requirements for

maximum IAQ.

• With their combination of high energy savings and

high IAQ, Trane dedicated outdoor air systems can earn

buildings LEED® credits.

4

Humidity control:

Key to comfort. Key to cost savings.

6"

Trane dedicated outdoor air

systems: a perfect match for

nearly any HVAC system

Trane dedicated outdoor air systems can

be designed to integrate seamlessly into

many HVAC system designs, making them

perfect for both retrofit and new construction

projects. In some cases, Trane dedicated

outdoor air systems can even serve as

standalone devices.

All commercial HVAC designs require a certain

amount of outdoor air to be introduced to

the system. Due to their versatility, Trane

dedicated outdoor air systems can play a key

role in nearly any HVAC design, including:

• Constant-air systems

• Variable-air-volume (VAV) systems

• Fan coil units

• Unit ventilators

• Water-source heat pumps

• Variable refrigerant flow (VRF) systems

Dehumidification by design: high-performance

humidity control

Air conditioning units are designed to cool air; their dehumidification

abilities aren’t optimized for maximum effectiveness and efficiency. A Trane

dedicated outdoor air system can quickly bring indoor humidity under

control with components specifically designed to handle the process.

• Six-row evaporator coil—This 12-fins-

per-inch evaporator coil is precisely

engineered to manage the dehumidification

process. When activated, it maintains

a temperature of 38° F — an optimal

temperature for quickly removing moisture

from air while avoiding coil icing.

• Hot-gas reheat coil—After dehumidifying, outdoor air can be

uncomfortably cold. The hot-gas reheat coil raises its temperature to a

more-comfortable — but still cool — temperature. The cool, dehumidified

air is then ducted to the building’s interior or to terminal devices.

– To maximize energy efficiency, the hot-

gas reheat coil is warmed with heat

energy captured from the operation of the

compressor that chills the evaporator coil —

an effective energy-conserving strategy.

– The hot gas reheat coil is located a minimum

of 6 inches away from the chilled evaporator

coil, both to avoid affecting the chilling

performance of the evaporator coil, as well as

to avoid re-evaporating the condensed water

back into the air. Strategic distancing of the

hot gas reheat coil from the evaporator coil

makes the overall dehumidification process

more efficient.

5

Comfort and cost savings:

How Trane dedicated outdoor air systems benefit people and budgets

Trane® dedicated outdoor air systems include numerous advanced features that help deliver efficient, effective performance.

Engineered to integrate with nearly any kind of HVAC design, a Trane dedicated outdoor air system can give your building more

indoor comfort and lower energy bills.

High-efficiency plenum

fan — Premium-efficiency

direct-drive motor with a

variable-speed drive powers

backward-curved blades to

efficiently move air.

Energy recovery cassette — This

optional energy-saving device recovers

thermal energy from exhaust air,

reducing utility costs.

Six-row evaporator coil — Efficiently

and economically cools and

dehumidifies outdoor air.

Digital scroll compressors — by

operating at constant speed and digitally

controlling position of the orbital scroll

in relation to the fixed scroll, very precise

capacity matching at part load conditions

can be achieved.

Fully modulating indirect-

fired gas burner — Delivers

the precise amount of heat

called for by demand levels,

saving energy and utility

costs.

More benefits for your building — and you

Reduced-size HVAC components — HVAC

components can be smaller in size, due to the Trane

dedicated outdoor air system’s ability to precondition

outdoor air. Smaller equipment can have a lower first

cost—and use less energy for reduced operating costs.

Smaller ductwork — The Trane dedicated outdoor air

system helps the HVAC system provide all the indoor

comfort required using less air—and using smaller

ductwork, which costs less.

Lower-power electrical riser — An HVAC system

enhanced with a Trane dedicated outdoor air system

uses less electricity, so it requires a lower-power

electrical riser — another first-cost saving.

6

Easy slide-out access — Makes servicing the plenum

fan/motor combination and optional energy recovery

cassette fast and easy.

Beltless fan motor — Direct-drive design means no belts

to break or change.

No-tool, reversible access doors — The access doors

on Trane dedicated outdoor air systems don’t require tools

to open, and their reversible hinges and handles make

opening easier in tight-fit installations.

Easy-change air filter holder — Allows fast, tool-less

filter changes — and quick adjustment for switching

between 2-, 4- and 6-inch filters.

25-year warranted heat exchanger (not shown) —

Long-life type 409 stainless steel construction for superior

oxidation and corrosion resistance.

Optional electro-fin coating (not shown) — Protects

coils from environmental corrosion for longer service life.

Carefully designed with less maintenance in mind

Trane dedicated outdoor air systems are engineered not only to be easy to maintain, but also to need less maintenance altogether.

Thoughtful design features and durable components help make Trane dedicated outdoor air systems easier to keep running at peak

efficiency longer—and more affordably, too.

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Performance

Trane® products are designed, engineered, built and tested to

provide exceptional performance. Trane dedicated outdoor air

systems efficiently provide conditioned 100 percent outdoor

air to a building’s interior, improving IAQ and reducing energy

costs—an HVAC solution that honors a long legacy of indoor

comfort solutions developed by Trane.

Innovation

Trane was built on the belief that innovative leadership can

address virtually any challenge. Trane dedicated outdoor air

systems help efficiently solve IAQ challenges, and have earned

their place in a century of Trane technological breakthroughs in

the science of HVAC solutions.

Commitment

Our commitment to customer satisfaction is what has kept

Trane an industry leader for more than a century. Carefully

listening to our customers and truly understanding their needs

is the surest way for us to recommend the right indoor comfort

solution that will provide years of service and satisfaction.

Because Trane offers a wide variety of products—including

Trane dedicated outdoor air systems—we are uniquely able to

match every customer with a system or combination of systems

that’s right for them.

Knowledge

To become and remain an industry leader requires a full

understanding of existing knowledge and a never-ending

quest for new discoveries. For one hundred years, Trane has

built and maintained its leadership status in the HVAC industry

by employing the brightest and most inquisitive scientists,

engineers and design experts—all of whom share a singular

passion to know and explore the ever-evolving technology that

improves the lives of our customers.

Visit Trane.com/OAU for more information on Trane dedicated

outdoor air systems—or contact your local Trane account

manager to learn more.

July 17, 2013

Ingersoll Rand (NYSE:IR) advances the quality of life by creating and sustaining safe, comfortable and efficient

environments. Our people and our family of brands—including Club Car®, Ingersoll Rand®, Schlage®, Thermo King® and

Trane®—work together to enhance the quality and comfort of air in homes and buildings; transport and protect food

and perishables; secure homes and commercial properties; and increase industrial productivity and efficiency.

We are a $14 billion global business committed to a world of sustainable progress and enduring results.

We are committed to using environmentally conscious print practices. © 2013 Ingersoll-Rand Company OAU-SLB003-EN

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