Valent® VX DOAS Unit

Trane and Valent have collaborated to expand access to improved dedicated outdoor air solutions across the U.S. and Canada. This exclusive agreement brings Valent’s proven DOAS, energy recovery, and value-added rooftop solutions together with Trane’s trusted sales and support network, helping customers achieve energy-efficient ventilation, improved indoor air quality, and greater comfort.

A dedicated outdoor air system unit cools and dehumidifies 100% of outdoor air before directing it to occupied building zones, helping to meet ventilation standards, and manage indoor humidity, and reduce the load on HVAC systems.

Valent dedicated outdoor air systems are designed to handle the ventilation needs of a building separately from its heating and cooling functions. 

A dedicated outdoor air system unit operates by taking in outside air and filtering the air to help reduce particles and contaminants. It will then pre-condition the air (heating or cooling). The air is then further conditioned to dehumidify and help reach target temperature and humidity levels for ventilation. The DOAS unit will then distribute the conditioned outside air through the building’s ventilation system, independent of the local HVAC equipment that manages the heating and cooling of the space.

Local HVAC units are responsible for handling the specific cooling and heating needs of each zone. When equipped with energy recovery, the DOAS unit will use exhaust air from the building to precondition the incoming outdoor air before exhausting outside. By treating outdoor air separately from recirculated air, the DOAS unit provides adequate ventilation airflow and helps maintain control over humidity levels.  

As a general guideline, size of the dedicated outdoor air system unit is determined by both the ventilation load and the space latent loads during peak outdoor-enthalpy condition.

Local HVAC equipment that does heating and cooling would be appropriate to pair with a DOAS unit. Terminal equipment like VRF, water-source heat pumps, fan coils, blower coils, and sensible cooling terminal units also can be paired with DOAS units.

• Energy Efficiency and Sustainability: Valent VX DOAS conditions up to 100% outdoor air, helping reduce the load on central HVAC systems. By decoupling latent and sensible load management, the central HVAC systems can be properly sized to support overall system energy efficiency.
• Humidity Control: The Valent VX DOAS is engineered to help manage humidity levels effectively during peak and off-peak conditions. By conditioning outdoor air to the proper supply-air dew point at full and part load conditions, the DOAS unit helps indoor air feel comfortable.