The dedicated outdoor air system (DOAS) market is expanding as businesses and building owners increasingly prioritize energy-efficient ventilation, indoor air quality, and sustainable building operations. DOAS technology treats and supplies outdoor air separately from the building’s primary heating and cooling systems, helping manage humidity and maintain suitable ventilation conditions.
According to Fortune Business Insights, the global Dedicated Outdoor Air System DOAS Market was valued at USD 5.85 billion in 2025. The market is projected to grow from USD 6.23 billion in 2026 to USD 10.31 billion by 2034, exhibiting a compound annual growth rate CAGR of 6.50% during the forecast period.
Why Is the Dedicated Outdoor Air System DOAS Market Growing?
The DOAS market is growing because building operators increasingly need ventilation systems that improve indoor air quality while controlling energy consumption. Hospitals, offices, schools, hotels, and industrial facilities require dependable fresh-air delivery and humidity management to support occupant comfort and operational requirements.
The expansion of commercial construction and healthcare infrastructure is creating demand for advanced HVAC equipment. Green building initiatives and energy-efficiency standards are also encouraging building owners to consider systems that improve ventilation performance.
In addition, smart building technologies are making it easier to monitor airflow, manage ventilation according to occupancy, and optimize energy use. These developments are supporting demand for modern DOAS solutions in both new construction and building renovation projects.
Key Market Trends
Increasing Adoption of Smart HVAC Controls: Manufacturers are incorporating connected sensors, automated airflow controls, and building management system integration to improve ventilation monitoring and energy management.
Growing Demand for Energy Recovery: Heat exchangers and energy recovery components can reduce the energy required to condition outdoor air, helping buildings improve HVAC efficiency.
Focus on Indoor Air Quality: Healthcare facilities, educational institutions, offices, and industrial buildings are investing in ventilation technologies that support fresh-air delivery and humidity control.
Expansion of Green Buildings: Sustainable construction and energy-efficient building upgrades are creating opportunities for advanced DOAS installations.
Development of Modular Systems: Compact packaged units and customizable equipment designs are helping manufacturers address different building sizes, ventilation needs, and installation requirements.
Dedicated Outdoor Air System DOAS Market Dynamics
Driver: Increasing Demand for Energy-Efficient Ventilation Systems
Growing awareness of energy conservation and indoor air quality is a major driver of the DOAS market. These systems provide dedicated outdoor-air treatment and can help manage humidity while supporting building ventilation requirements.
Restraint: High Installation and Maintenance Costs
Installing a DOAS can require specialized equipment, ductwork, heat recovery components, and control systems. These requirements can increase initial project costs, particularly for smaller facilities and buildings undergoing renovation.
Opportunity: Expansion of Green Buildings and Smart Infrastructure
The development of sustainable commercial buildings, healthcare facilities, educational campuses, and data centers creates opportunities for DOAS manufacturers. Building operators are increasingly looking for ventilation technologies that support energy efficiency and indoor environmental quality.
Challenge: Integration with Existing HVAC Systems