Deliver clean, dehumidified outside air in any weather or climate condition.
The Withair® dedicated outdoor air system (DOAS) improves indoor air quality while meeting the needs of building owners and consulting engineers. Designed to optimally perform in all outdoor conditions and climates, DOAS provides constant neutral air coupled with a parallel system. And with available features like direct-drive supply, high-efficiency EMC fan motors and variable frequency drives, you can improve energy efficiency from day one.
Withair® DOAS are designed to provide ventilation for the most demanding applications. All 100% outdoor air units feature high capacity DX coils and efficient scroll compressors, making them ideal for schools, hotels, offices and other buildings that require efficient and reliable ventilation.
Withair® dedicated outdoor air systems condition 100 percent outdoor air — improving indoor air quality, controlling relative humidity and reducing the load on other HVAC equipment in a building. Up to 100% of outdoor air year-round, reduce latent loads, enhance comfort and energy efficiency, and maintain your building’s health.
Why use Dedicated Outdoor Air Systems (DOAS)?
Higher indoor air quality — Improve indoor air quality by properly conditioning and filtering the outdoor air required to ventilate a building.
Lower overall HVAC energy use — Efficiently condition outdoor air and reduce the load on local HVAC equipment.
Smaller local HVAC equipment — When Dedicated Outdoor Air Systems deliver outdoor air that’s either at a cooler temperature or at a lower dew point than room-neutral air, the local cooling equipment — such as fan coils, water-source heat pumps, VRF terminals, etc. — can be smaller.
Effective humidity control — Optimized for efficient humidity control, which improves occupant comfort.
A variety of HVAC solutions — Easily integrated with a wide variety of other HVAC systems — or used in a standalone application, such as a kitchen.
Our units are backed with industry leading warranty and protection coverage and an unrivaled national network of parts and service providers. Enhanced occupant comfort and building health. Higher energy efficiency. And a leading national network. All that and the performance and reliability you expect from Withair®.
Providing the ventilation and dehumidification that your system needs !
State of The Art Feature
简体中文
Air-Cooled Heat Pumps 
Water Source Heat Pumps 
Air to Water Heat Pumps 
Industrial Process Heating Systems 
Integrated Chilled Water Systems 
Air-Cooled Chillers 
Water-Cooled Chillers 
Industrial Process Cooling Systems 
iZoned Rooftop Systems 
Packaged Rooftop Units 
Outdoor Air Systems 
Split & Packaged DX Systems 
Airaday® System 
Chilled Water Fan Coil Units 
Air Handling Units 
