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Dedicated Outdoor Air Systems

Shape your indoor environment with unparalleled precision while ensuring a constant supply of conditioned, fresh air.
Explore DOAS products

Bring the outdoors in

A Dedicated Outdoor Air System (DOAS) is a component of the HVAC system specifically designed to supply fresh outdoor air to a building’s interior. Unlike traditional HVAC systems, which recirculate indoor air, a DOAS conditions outdoor air separately, ensuring that fresh, clean air is consistently delivered to indoor spaces. 

 

Engineered for exceptional environments — like yours.

  • Improved Indoor Air Quality

    DOAS units are ideal for environments where maintaining high indoor air quality is essential, such as schools, fitness centers, grocery stores, and entertainment venues. They filter, condition, and sometimes dehumidify or humidify the outdoor air before it enters the building, ensuring a healthy and comfortable indoor environment.

  • Higher Energy Efficiency

    DOAS units can include energy recovery systems that reclaim energy from the exhaust air to pre-condition incoming outdoor air, reducing overall energy consumption. 

  • Separate Ventilation and Conditioning

    By decoupling ventilation from space heating and cooling needs, DOAS units provide greater flexibility and efficiency. They focus solely on ventilation and humidity control, while separate systems handle space heating or cooling, optimizing overall performance. 

     

  • Combined Control Options

    Single-system DOAS units are available to combine ventilation, temperature, and humidity control in one packaged design, providing the benefits of simple single-system control without compromising on air quality and ventilation. 

DOAS units are ideal for environments where maintaining high indoor air quality is essential, such as schools, fitness centers, grocery stores, and entertainment venues. They filter, condition, and sometimes dehumidify or humidify the outdoor air before it enters the building, ensuring a healthy and comfortable indoor environment.

DOAS units can include energy recovery systems that reclaim energy from the exhaust air to pre-condition incoming outdoor air, reducing overall energy consumption. 

By decoupling ventilation from space heating and cooling needs, DOAS units provide greater flexibility and efficiency. They focus solely on ventilation and humidity control, while separate systems handle space heating or cooling, optimizing overall performance. 

 

Single-system DOAS units are available to combine ventilation, temperature, and humidity control in one packaged design, providing the benefits of simple single-system control without compromising on air quality and ventilation. 

Reliable DOAS for Every Industry

DOAS units deliver optimal performance across diverse industries:

Venue
Entertainment Venues
School
Education
Government
Government
Healthcare-1
Healthcare
Hopitality
Hospitality
Workplace
Office Buildings
Mall
Retail
Restaurant-1
Restaurant
Grocery
Supermarkets

Key Considerations for Configuring DOAS

  • Ventilation Standards and Requirements

    AAON units are designed to comply with the stringent ventilation regulations and requirements set by local building codes. By understanding these standards, you can ensure that your DOAS is tailored to meet the specific needs of your environment. Factors like occupancy, building type, and indoor air quality requirements help determine the appropriate outdoor air intake rates.  

    Learn about specific DOAS standards and requirements in our knowledge base
  • Integration with Space Conditioning Systems
    Effective integration of your DOAS with your building's heating and cooling systems is essential for maintaining optimal indoor comfort and energy efficiency. The fresh air brought in by the DOAS can be managed in various ways, depending on your specific use case: 
    • Direct System: The conditioned or tempered supply air from the DOAS is delivered directly into the space. Additional terminal air conditioners can be used to manage the sensible load and provide zone control.
    • Indirect System: The conditioned outdoor air from the DOAS is integrated as part of the return air to multiple terminal units.
    • Passive System: When using passive heating or cooling methods, such as chilled beam cooling or radiant heating, a DOAS provides necessary ventilation. Special considerations ensure the DOAS delivers air at a low dew point to prevent condensation on chilled beams. 

    Whether your system is direct, indirect, or passive, AAON’s equipment can be tailored to meet your specific requirements. 

  • Precise Temperature and Humidity Control

    Consistent comfort in your building relies on precise temperature and humidity control. Features such as modulating compressors and hot gas reheat control humidity without over-cooling a space. High turn-down modulating heat provides space-tempering in mild to extreme outdoor temperatures. 

  • Improved Filtration and Cleaner Air

    Enhancing air quality in your building starts with effective filtration. Advanced filtration systems help prevent contaminants from entering the space, creating a healthier indoor environment. If you have particular air quality requirements to meet, consider using high-efficiency filters with a MERV (Minimum Efficiency Reporting Value) rating up to 14  or HEPA-rated filters to capture smaller airborne particles

     

AAON units are designed to comply with the stringent ventilation regulations and requirements set by local building codes. By understanding these standards, you can ensure that your DOAS is tailored to meet the specific needs of your environment. Factors like occupancy, building type, and indoor air quality requirements help determine the appropriate outdoor air intake rates.  

Learn about specific DOAS standards and requirements in our knowledge base
Effective integration of your DOAS with your building's heating and cooling systems is essential for maintaining optimal indoor comfort and energy efficiency. The fresh air brought in by the DOAS can be managed in various ways, depending on your specific use case: 
  • Direct System: The conditioned or tempered supply air from the DOAS is delivered directly into the space. Additional terminal air conditioners can be used to manage the sensible load and provide zone control.
  • Indirect System: The conditioned outdoor air from the DOAS is integrated as part of the return air to multiple terminal units.
  • Passive System: When using passive heating or cooling methods, such as chilled beam cooling or radiant heating, a DOAS provides necessary ventilation. Special considerations ensure the DOAS delivers air at a low dew point to prevent condensation on chilled beams. 

Whether your system is direct, indirect, or passive, AAON’s equipment can be tailored to meet your specific requirements. 

Consistent comfort in your building relies on precise temperature and humidity control. Features such as modulating compressors and hot gas reheat control humidity without over-cooling a space. High turn-down modulating heat provides space-tempering in mild to extreme outdoor temperatures. 

Enhancing air quality in your building starts with effective filtration. Advanced filtration systems help prevent contaminants from entering the space, creating a healthier indoor environment. If you have particular air quality requirements to meet, consider using high-efficiency filters with a MERV (Minimum Efficiency Reporting Value) rating up to 14  or HEPA-rated filters to capture smaller airborne particles

 

Leading Products Featuring DOAS Innovations

RN Series

RN Series

Capacity 6 - 140 tons
View Product
RQ Series

RQ Series

Capacity 2 - 5 tons
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RZ Series

RZ Series

Capacity 45 - 240 tons
View Product
V3 Series

V3 Series

Capacity 450 - 10,000 cfm
View Product
CF Series

CF Series

Capacity 2 - 60 tons
View Product
H3 Series

H3 Series

Capacity 450 - 10,000 cfm
View Product
M2 Series

M2 Series

Capacity 3,800-21,000 cfm
View Product
RN Series

RN Series

Capacity 6-70 tons
View Product
RQ Series

RQ Series

Capacity 2-5 tons
View Product
V3 Series

V3 Series

Capacity 2-60 tons
View Product
H3 Series

H3 Series

Capacity 2-60 tons
View Product
CF Series

CF Series

Capacity 2-60 tons
View Product

Engineered to Optimize

All AAON HVAC products are highly configurable and designed to optimize your exact environment with cutting-edge engineering to push the boundaries in virtually any setting. 

Industry Leading Quality

AAON stops at nothing to design the very best. Our systems set the industry standard for longevity and low cost of ownership. 

Ease of Maintenance

AAON equipment is easy to access and convenient to work on. Our award-winning cabinet designs make it simple for technicians to service our units efficiently and affordably. 

Verified Performance

AAON HVAC units offer easy start-up and renowned reliability. Our products are tested for all functions and receive a unit-specific report before they leave the factory. 

Dare us to exceed expectations.

Regardless of the challenge, AAON has the capabilities to fulfill project requirements and deliver long-term value to customers. Contact an AAON Representative to learn how our products serve as your solutions. 

Contact your local AAON rep