Demand for Dedicated Outdoor Air System (DOAS) in UK

Demand for Dedicated Outdoor Air System (DOAS) in UK 2025 to 2035

The demand for dedicated outdoor air system (DOAS) in the UK is projected to grow from USD 354.2 million in 2025 to approximately USD 631.2 million by 2035, with demand forecast to expand at a compound annual growth rate (CAGR) of 5.9% between 2025 and 2035. Growth is driven by expanding commercial building requirements and increasing adoption of advanced ventilation solutions across UK HVAC sectors, particularly in England where commercial facilities and building management companies are accelerating DOAS deployment.

Increasing integration of packaged unit technologies in commercial applications and growing adoption of energy recovery approaches continue to drive demand. HVAC manufacturers and building suppliers are expanding their DOAS investments to address the growing complexity of modern ventilation requirements and building specifications, with UK facilities leading investments in advanced air handling systems.

Quick Stats for UK DOAS Industry

• UK DOAS Sales Value (2025): USD 354.2 million
• UK DOAS Forecast Value (2035): USD 631.2 million
• UK DOAS Forecast CAGR: 5.9%
• Leading Application in UK DOAS Industry: Packaged DOAS Units (72.8%)
• Key Growth Regions in UK DOAS Industry: England, Scotland, Wales, and Northern Ireland
• Regional Leadership: England holds the leading position in demand
• Key Players in UK DOAS Industry: Daikin Industries Limited, Carrier Global Corporation, Johnson Controls International PLC, LG Electronics Incorporated, Trane Technologies PLC, Greenheck Fan Corporation, AAON Incorporated, DesertAire Incorporated, Addison HVAC, DRI (Desiccant Rotors International)

The packaged DOAS units segment is projected to register 72.8% of DOAS demand in 2025. DOAS equipment is widely used in packaged configurations because it enables precise ventilation control, reliable system performance, and proven operational stability that enhance indoor air quality. It also supports diverse building applications and ventilation preferences across commercial environments, improving system characteristics and effectiveness. Commercial buildings applications are expected to account for 64.3% of DOAS demand in 2025. DOAS equipment is widely used for commercial buildings because it provides proven air quality enhancement and comprehensive performance support for demanding ventilation requirements. Its integration enhances system character, processing capabilities, and building outcomes by enabling improved air quality differentiation and authentic performance positioning during operation.

From 2030 to 2035, demand is forecast to grow from USD 477.3 million to USD 631.2 million, adding another USD 153.9 million, which constitutes 55.6% of the overall ten-year expansion. This period is expected to be characterized by expansion of energy recovery integration, development of advanced control formulations and specialized ventilation products, and implementation of air quality monitoring systems across different building applications. The growing adoption of smart building principles and enhanced ventilation customization requirements, particularly in England and Scotland regions, will drive demand for more sophisticated DOAS systems and integrated HVAC platforms.

The DOAS industry is experiencing steady growth in the UK primarily due to the increasing adoption of advanced ventilation alternatives and the expansion of commercial building initiatives. The country's emphasis on indoor air quality advancement and building development necessitates investment in effective DOAS systems (ventilation support, air quality protection) and advanced HVAC products (performance enhancement, efficiency verification) for building operations and commercial functions.

UK DOAS Industry Key Takeaways

Metric	Value
UK DOAS Sales Value (2025)	USD 354.2 million
UK DOAS Forecast Value (2035)	USD 631.2 million
UK DOAS Forecast CAGR (2025-2035)	5.9%

Why is the UK DOAS Industry Growing?

Modern HVAC manufacturers and building practitioners rely on professional DOAS systems to ensure ventilation competitiveness, air quality improvement, and optimal pathway achievement toward building goals. Advanced commercial requirements necessitate comprehensive DOAS solutions including specialized control capabilities, ventilation support systems, and air quality enhancement infrastructure to address diverse application needs and performance specifications.

HVAC manufacturers and building practitioners are emphasizing sourcing and integrated ventilation solutions to enhance air quality profiles, access building optimization trends, and demonstrate HVAC leadership in competitive commercial environments. Advanced performance policies and DOAS efficiency requirements are establishing standardized building pathways that require professional systems and performance assurance, with UK facilities often pioneering large-scale implementation of advanced DOAS technologies.

Opportunity Pathways - Demand for DOAS in the UK

The DOAS demand in the UK is positioned for steady expansion, growing from USD 354.2 million in 2025 to USD 631.2 million by 2035, reflecting a 5.9% CAGR. Rising adoption of professional DOAS systems in commercial facilities, HVAC operations, and building applications is driving growth as operators seek DOAS solutions that maximize ventilation effectiveness and comply with stringent air quality standards. Additionally, demand from healthcare applications and advanced building implementations strengthens opportunities for both sophisticated ventilation formulations and integrated HVAC solutions.

Suppliers focusing on commercial implementations, HVAC integration, and advanced DOAS capabilities stand to gain from evolving building standards and operator expectations for effective air quality management, technical validation, and ventilation enhancement.

• Pathway A - Commercial Implementations and Building Applications: HVAC manufacturers face increasing demands for reliable DOAS solutions in modern commercial facilities. Commercial systems enable enhanced ventilation effectiveness and comprehensive air quality capabilities without compromising building functionality. Solutions targeting commercial operations, office centers, and specialty facilities can achieve strong adoption rates through ventilation optimization and air quality enhancement improvements. Estimated revenue opportunity: USD 1.8-2.6 million.
• Pathway B - Packaged Unit Applications and System Processing: Building companies are increasingly adopting packaged unit systems for consistent DOAS utilization. Collaborations with ventilation platforms for integrated unit solutions can unlock large-volume supply contracts and long-term partnerships in building applications. Estimated revenue opportunity: USD 1.4-2.1 million.
• Pathway C - Healthcare and Institutional Applications: The growth in healthcare facilities, educational institutions, and institutional establishments creates robust demand for DOAS systems ensuring effectiveness in air quality processes. Suppliers offering healthcare solutions for institutional applications can build relationships with facility operators and building integrators. Estimated revenue opportunity: USD 1.1-1.6 million.
• Pathway D - Energy Recovery and Control Applications: Building requirements and modern ventilation demands are driving preference for energy recovery platforms with superior control capabilities. Suppliers offering comprehensive recovery solutions with exceptional system characteristics can differentiate offerings and attract performance-focused organizations. Estimated revenue opportunity: USD 0.9-1.3 million.
• Pathway E - Specialty HVAC and Industrial Solutions: Critical industrial applications require specialized DOAS configurations with advanced system features and enhanced control properties. Suppliers investing in HVAC development can secure advantages in serving demanding industrial applications. Estimated revenue opportunity: USD 0.7-1.0 million.
• Pathway F - Technical Services and Distribution Networks: Comprehensive distribution networks offering technical support, training, and ongoing service support create recurring revenue opportunities. Companies building strong expertise capabilities can capture ongoing relationships and enhance customer satisfaction across building facilities. Estimated revenue opportunity: USD 0.6-0.9 million.

Segmental Analysis

The industry is segmented by equipment type, capacity, end use, and region. By equipment type, the industry is divided into packaged DOAS units and custom-built DOAS units categories. In terms of capacity, industry is segmented into up to 20 tons, 20-50 tons, and above 50 tons. By end use, industry is divided into commercial buildings, healthcare & institutional, and industrial & others. Regionally, the industry is divided into England, Scotland, Wales, and Northern Ireland.

Why do Packaged DOAS Units Account for High Share of 72.8%?

The packaged DOAS units segment is projected to account for 72.8% of DOAS demand in 2025, making it the leading equipment category across the sector. This dominance reflects the system performance requirements and proven capabilities of packaged systems for existing building operations and commercial applications where ventilation precision is optimized through established processing capabilities and integrated control architecture. In the UK, where substantial commercial populations require DOAS integration without complete system modification, packaged platforms provide practical pathways for ventilation enhancement while maintaining building integrity. Continuous innovations are improving system consistency, ventilation characteristics, and control integration parameters, enabling HVAC manufacturers to achieve high performance standards while maximizing reliability. The segment's strong position is reinforced by the extensive existing commercial infrastructure requiring DOAS adoption and growing availability of unit suppliers with proven commercial experience.

• System compatibility and existing building integration make packaged platforms the preferred equipment for enhancing commercial operations and HVAC installations.
• Performance reliability and commercial demonstration track records are enhancing consumer confidence and system viability across large-scale adoption initiatives.

Why do Commercial Buildings Account for High Share of 64.3%?

Commercial buildings applications are expected to represent 64.3% of DOAS demand in 2025, demonstrating the significant role of office buildings and commercial facilities requiring comprehensive ventilation support solutions. Commercial buildings facilities including major office developments, retail operations, corporate buildings, and commercial programs generate consistent demand for DOAS systems that are technically and operationally favorable for building applications. The segment benefits from performance characteristics that provide air quality optimization and ventilation capabilities for commercial operation. In the UK, where commercial building development represents substantial portions of construction output, ventilation excellence requires DOAS integration across diverse building facilities. In England regions, where commercial concentrations are significant, DOAS demand is elevated by emphasis on maintaining building excellence while achieving performance targets.

• Building requirements and air quality optimization drive consistent demand across major office facilities, retail operations, corporate buildings, and commercial programs.
• The integration of DOAS-based solutions enhances the air quality, energy efficiency, and occupant comfort of commercial buildings, further supporting the sector's need for high-performance ventilation systems in both operation and end-use applications.

What are the Drivers, Restraints, and Key Trends in the UK DOAS Industry?

The country's DOAS demand is advancing steadily due to increasing commercial building requirements and growing recognition of ventilation necessity for building development, with England region serving as a key driver of innovation and application development. The sector faces challenges including competition from alternative HVAC systems, need for specialized performance validation development, and ongoing concerns regarding installation costs and technical considerations. National building guidelines and regional-level commercial initiatives, particularly building programs in England and Scotland regions, continue to influence DOAS selection and adoption timelines.

Expansion of Commercial Building Requirements and Air Quality Standards

The enhancement of ventilation regulations, gaining particular significance through building standards and advanced commercial programs, is enabling DOAS suppliers to achieve differentiation without prohibitive development costs, providing predictable demand patterns through air quality requirements and building preferences. Enhanced performance standards offering substantial opportunities for professional DOAS systems and integrated applications provide foundational dynamics while allowing suppliers to secure building agreements and commercial partnerships. These trends are particularly valuable for first-mover suppliers and advanced system development that require substantial technical investments without immediate cost advantages.

Incorporation of Control Technologies and Performance Validation Systems

Modern DOAS suppliers and HVAC companies are establishing advanced control networks and centralized performance management facilities that improve system effectiveness through technical standardization and air quality validation. Integration of efficiency optimization systems, high-precision control technologies, and coordinated performance management enables more efficient DOAS operation across multiple building locations. Advanced building concepts also support next-generation commercial applications including specialized ventilation integration, air quality optimization, and regional DOAS supply networks that optimize system-level economics while enabling comprehensive performance monitoring across HVAC regions, with UK developments increasingly adopting collaborative research models to reduce individual supplier costs and accelerate validation.

Analysis of UK DOAS Industry by Key Region

Region	CAGR (2025 to 2035)
England	6.3%
Scotland	6.0%
Wales	6.1%
Northern Ireland	6.0%

The UK DOAS industry is witnessing steady growth, supported by rising commercial building requirements, expanding HVAC production initiatives, and the deployment of advanced DOAS technologies across regions. England leads the nation with a 6.3% CAGR, reflecting progressive building trends, substantial HVAC innovation, and early adoption of professional DOAS systems. Scotland follows with a 6.0% CAGR, driven by extensive commercial infrastructure, favorable building demographics, and concentration of specialized operations that enhance application development. Wales grows at 6.1%, as building modernization and commercial opportunities increasingly drive DOAS adoption. Northern Ireland demonstrates growth at 6.0%, supported by expanding HVAC facilities and regional building initiatives.

Why Does England Lead DOAS Demand?

Demand for DOAS in England is projected to exhibit strong growth with a CAGR of 6.3% through 2035, driven by progressive building preferences, substantial commercial development creating advanced DOAS opportunities, and concentration of HVAC advancement across London and surrounding metropolitan areas.

As the dominant region with extensive commercial infrastructure and performance-focused building policies, England's emphasis on comprehensive air quality excellence and HVAC leadership is creating significant demand for professional DOAS systems with proven effectiveness and reliable application potential. Major DOAS suppliers and HVAC companies are establishing comprehensive building development programs to support innovation advancement and advanced system deployment across diverse applications.

• Commercial development trends and building preferences are requiring comprehensive air quality management strategies and DOAS solutions, driving demand for systems with demonstrated performance enhancement capabilities and permanent ventilation assurance throughout diverse building operations.
• Innovation ecosystem strength and commercial capital availability are supporting deployment of next-generation DOAS technologies and novel application pathways that enhance commercial viability, reduce operation costs, and create new HVAC opportunities across building and performance-focused applications, positioning England as a national building leadership region.

Why Does Scotland Show Strong Growth?

Demand for DOAS in Scotland is expanding at a CAGR of 6.0%, supported by extensive HVAC facilities including large-scale building programs, commercial operations, and industrial companies generating concentrated demand favorable for DOAS systems. The region's building characteristics, featuring substantial commercial infrastructure and HVAC requirements ideal for DOAS integration, provide natural advantages.

HVAC expertise concentrated in Glasgow, Edinburgh, and regional commercial corridors facilitates application development and ventilation management. DOAS suppliers and HVAC companies are implementing comprehensive building strategies to serve expanding performance-focused requirements throughout Scotland.

• HVAC concentration and favorable application economics are creating opportunities for specialized DOAS suppliers that can integrate ventilation systems with existing commercial operations.
• DOAS positioning and building awareness are building regional competitive advantages in HVAC applications, enabling comprehensive commercial development and building cluster enhancement that meets air quality targets while accessing advanced pricing opportunities.

Why Does Wales Show Consistent Expansion?

Demand for DOAS in Wales is growing at a CAGR of 6.1%, driven by substantial commercial facilities from building operations, HVAC distributors, and regional operators requiring DOAS pathways.

The region's commercial base, supporting critical building operations, is increasingly adopting DOAS technologies to maintain competitiveness while meeting air quality expectations. HVAC companies and DOAS suppliers are investing in ventilation integration systems and regional supply infrastructure to address growing building management requirements.

• Commercial modernization imperatives and HVAC competitiveness concerns are facilitating adoption of DOAS technologies that enable continued building operations while achieving air quality enhancement across HVAC operations, commercial distributors, and operator facilities.
• Ventilation optimization opportunities including regional commercial development and DOAS utilization for enhanced building operations are creating unique regional advantages and diversified application types throughout Wales building operations.

What Factors Underpin DOAS Demand in Northern Ireland?

Demand for DOAS in Northern Ireland is advancing at a CAGR of 6.0%, supported by expanding commercial facilities, regional building development including HVAC and commercial operations, and growing emphasis on ventilation solutions across the region.

Commercial modernization and HVAC facility expansion are driving consideration of DOAS systems as air quality enhancement pathways. HVAC companies and DOAS suppliers are developing regional capabilities to support emerging ventilation deployment requirements.

• Commercial expansion and HVAC diversification are creating economic drivers for DOAS technologies and system adoption across building and commercial facilities seeking competitive differentiation pathways.
• Regional commercial cooperation and coordinated building development are establishing consistent DOAS environments and shared HVAC infrastructure that support multi-regional commercial projects throughout Northern Ireland building operations.

Competitive Landscape of UK DOAS Industry

UK DOAS industry is defined by competition among specialized HVAC manufacturers, ventilation equipment companies, and integrated solution providers, with major industrial corporations maintaining significant influence through research resources and application development capabilities. Companies are investing in system advancement, performance assurance infrastructure optimization, distribution network structures, and comprehensive technical validation services to deliver effective, reliable, and accessible air quality enhancement solutions across UK building and commercial applications. Strategic partnerships, research infrastructure development, and first-mover application execution are central to strengthening competitive positioning and presence across commercial, performance-focused, and industrial HVAC applications.

Daikin Industries Limited leads with an 18.7% share, offering comprehensive DOAS solutions including system development, performance assurance, and distribution services with focus on commercial applications, building, and accessibility across UK operations. Carrier Global Corporation delivers full-service ventilation supply including HVAC distribution, custom integration, and technical support serving UK and international building projects.

Johnson Controls International PLC emphasizes comprehensive advanced solutions with integrated system capabilities, performance management, and control features leveraging HVAC sector expertise. LG Electronics Incorporated offers DOAS application development and air quality optimization operations for commercial and building applications across UK operations.

Key Players in UK DOAS Industry

• Daikin Industries Limited
• Carrier Global Corporation
• Johnson Controls International PLC
• LG Electronics Incorporated
• Trane Technologies PLC
• Greenheck Fan Corporation
• AAON Incorporated
• DesertAire Incorporated
• Addison HVAC
• DRI (Desiccant Rotors International)

Scope of the Report

Item	Value
Quantitative Units	USD 631.2 million
Equipment Type	Packaged DOAS Units, Custom-built DOAS Units
Capacity	Up to 20 Tons, 20-50 Tons, Above 50 Tons
End Use	Commercial Buildings, Healthcare & Institutional, Industrial & Others
Regions Covered	England, Scotland, Wales, Northern Ireland
Key Companies	Daikin Industries Limited, Carrier Global Corporation, Johnson Controls International PLC, LG Electronics Incorporated, Trane Technologies PLC, Greenheck Fan Corporation, AAON Incorporated, DesertAire Incorporated, Addison HVAC, DRI (Desiccant Rotors International), Regional DOAS specialists
Additional Attributes	Sales by equipment type and capacity segment; regional demand trends across England, Scotland, Wales, and Northern Ireland; competitive landscape with established DOAS suppliers and specialized HVAC developers; performance preferences for packaged DOAS units versus custom-built technologies; integration with building programs and advanced commercial policies, particularly advanced in the England region

UK DOAS Industry by Segments

• Equipment Type :

  • Packaged DOAS Units
  • Custom-built DOAS Units

• Capacity :

  • Up to 20 Tons
  • 20-50 Tons
  • Above 50 Tons

• End Use :

  • Commercial Buildings
  • Healthcare & Institutional
  • Industrial & Others

• Region :

  • England
  • Scotland
  • Wales
  • Northern Ireland