Outdoor air systems
- 1 Air quality standards
- 2 Smoking ban
- 3 Ventilation effectiveness
- 4 VOC reduction
- 5 Air filtration
- 6 Microbe and mold control
- 7 Construction pollution management
- 8 Healthy entrance
- 9 Cleaning protocol
- 10 Pesticide management
- 11 Fundamental material safety
- 12 Moisture management
- 13 Air flush
- 14 Air infiltration management
- 15 Increased ventilation
- 16 Humidity control
- 17 Direct source ventilation
- 18 Air quality monitoring and feedback
- 19 Operable windows
- 20 Outdoor air systems
- 21 Displacement ventilation
- 22 Pest control
- 23 Advanced air purification
- 24 Combustion minimization
- 25 Toxic material reduction
- 26 Enhanced material safety
- 27 Antimicrobial surfaces
- 28 Cleanable environment
- 29 Cleaning equipment
20. Outdoor air systems
Dedicated outdoor air systems separate the imperatives of heating and cooling from ventilation requirements so that optimal air quality and thermal comfort can be independently achieved.
Although there is evidence that thermal comfort and space conditions may improve through the use of dedicated outdoor air systems (DOAS), ASHRAE does not currently have a separate published and peer reviewed standard or design guide for them. A properly designed DOAS can save energy compared to conventional systems while always supplying the appropriate amount of ventilation. This feature sets requirements for projects implementing DOAS systems.
The following requirements are met:
Applicability Matrix
| Core & Shell | New Construction | WELL Interiors | |
|---|---|---|---|
| Part 1: Dedicated Outdoor Air Systems | - | O | O |
| Commercial Kitchen | Education | Multifamily Residential | Retail | |
|---|---|---|---|---|
| Part 1: Dedicated Outdoor Air Systems | O | - | O | O |
| 20.1.b |
ASHRAE Standard 55: Thermal Environmental Conditions for Human Occupancy sets best practices for thermal comfort in buildings. |