Dedicated Outdoor Air Systems (DOAS)
As building owners and facility managers continue to prioritize indoor air quality, occupant comfort, and energy efficiency, Dedicated Outdoor Air Systems (DOAS) have become an increasingly popular HVAC solution.
Unlike traditional HVAC systems that attempt to handle both ventilation and temperature control simultaneously, a DOAS is specifically designed to manage and condition outdoor ventilation air. This specialized approach can improve indoor air quality, reduce energy consumption, and enhance overall HVAC system performance.
At Level One HVAC, we help commercial and industrial facilities throughout Michigan design, install, service, and maintain DOAS equipment to support healthier and more efficient buildings.
What Is a Dedicated Outdoor Air System?
A Dedicated Outdoor Air System is an HVAC unit designed exclusively to provide fresh, conditioned outdoor air to a building.
Rather than relying on rooftop units, fan coils, or other HVAC equipment to introduce ventilation air, a DOAS independently treats outdoor air before delivering it into occupied spaces.
The system typically manages:
- Ventilation air requirements
- Humidity control
- Air filtration
- Heating and cooling of outdoor air
- Energy recovery
By separating ventilation from space conditioning, each system can perform its intended function more efficiently.
Why Ventilation Matters
Modern buildings are often designed to be highly energy efficient and tightly sealed. While this helps reduce energy costs, it can also limit the amount of fresh air entering the building.
Without adequate ventilation, indoor environments may experience:
- Poor air quality
- Increased humidity levels
- Unpleasant odors
- Higher concentrations of airborne contaminants
- Reduced occupant comfort
A properly designed DOAS ensures a continuous supply of fresh outdoor air while maintaining comfortable indoor conditions.
Benefits of a DOAS System
Many commercial facilities are turning to Dedicated Outdoor Air Systems because of their ability to improve both building performance and occupant well-being.
Key benefits include:
Improved Indoor Air Quality
A DOAS continuously introduces filtered outdoor air into the building, helping dilute indoor contaminants and support healthier environments.
This is especially important in:
- Schools
- Healthcare facilities
- Offices
- Manufacturing facilities
- Retail spaces
- Multi-tenant buildings
Better Humidity Control
Humidity plays a major role in occupant comfort and building health.
DOAS equipment can remove excess moisture from incoming outdoor air before it enters the building, helping prevent:
- Mold growth
- Condensation issues
- Indoor air quality concerns
- Occupant discomfort
This can be particularly beneficial during Michigan’s humid summer months.
Increased Energy Efficiency
Because ventilation and temperature control are handled separately, HVAC systems can operate more efficiently.
Benefits often include:
- Lower utility costs
- Reduced equipment runtime
- Improved HVAC performance
- Extended equipment lifespan
Many DOAS units also incorporate energy recovery technology to capture and reuse energy that would otherwise be lost.
Enhanced Occupant Comfort
When ventilation air is properly conditioned before entering occupied spaces, occupants experience more consistent temperatures and improved comfort throughout the building.
This can help eliminate hot and cold spots while supporting a healthier indoor environment.
Common Applications for DOAS Systems
Dedicated Outdoor Air Systems can be utilized in a wide range of commercial and industrial facilities.
Popular applications include:
- Office buildings
- Healthcare facilities
- Educational institutions
- Manufacturing facilities
- Warehouses
- Data centers
- Fitness centers
- Multi-family housing
- Retail environments
As building codes and ventilation requirements continue to evolve, DOAS systems are becoming an increasingly common component of modern HVAC designs.
Integrating DOAS with Existing HVAC Equipment
One of the advantages of a Dedicated Outdoor Air System is its flexibility.
DOAS equipment can work alongside:
- Rooftop units (RTUs)
- Variable Refrigerant Flow (VRF) systems
- Fan coil units
- Chilled water systems
- Heat pumps
- Air handling units (AHUs)
This allows facilities to improve ventilation and indoor air quality without necessarily replacing their entire HVAC infrastructure.
Installation, Service, and Maintenance
Like any commercial HVAC equipment, DOAS systems require proper design, installation, and ongoing maintenance to maximize performance.
Routine maintenance may include:
- Filter replacement
- Coil cleaning
- Energy recovery wheel inspections
- Sensor calibration
- Damper inspections
- Airflow verification
- Control system testing
Regular service helps ensure the system continues delivering clean, conditioned outdoor air while operating efficiently.
Partner with Level One HVAC
Dedicated Outdoor Air Systems are helping commercial facilities achieve healthier indoor environments, better humidity control, and improved energy efficiency.
Whether you’re designing a new facility, upgrading an existing HVAC system, or exploring ways to improve indoor air quality, Level One HVAC has the expertise to help.
Our team installs, services, maintains, and optimizes DOAS equipment and other commercial HVAC systems throughout Michigan. We work with facility managers, property owners, contractors, and engineers to deliver customized solutions that meet each building’s unique needs.
Contact Level One HVAC today to learn how a Dedicated Outdoor Air System can improve the performance, comfort, and efficiency of your facility.
Serving all of Michigan
Call: 844-616-4822