Dedicated Outdoor Air Systems
Dedicated Outdoor Air Systems

A dedicated outdoor air system (DOAS) is a unit supplying cooled, dehumidified outside air to the building in summer and heated outside air in the winter. The system can also include a total energy wheel. An energy recovery wheel offers up to 80% total effectiveness reducing the heating and cooling capacity requirement of the DOAS unit significantly.

Dedicated Outdoor Air Systems

A dedicated outdoor air system (DOAS) is a unit supplying cooled, dehumidified outside air to the building in summer and heated outside air in the winter. The system can also include a total energy wheel. An energy recovery wheel offers up to 80% total effectiveness reducing the heating and cooling capacity requirement of the DOAS unit significantly.

Dedicated Outdoor Air Systems
OVERVIEW
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RV/RVE

Pre-engineered rooftop ventilators condition and deliver 100% outside air or mixtures of outdoor air and return air to a building. This unit is ideal for 100% outdoor air, variable air volume and single zone applications.

  • 800 to 13,500 cfm
  • Up to 3 in. wg (ESP)
  • Cooling options: packaged direct expansion, split direct expansion with remote condenser and chilled water
  • Heating options: indirect gas, electric, and hot water

The RV/RVE offers several value-added features. These include a microprocessor, low-sound condenser fans and a direct drive, variable frequency drive (VFD), and backward-inclined fans. Several options are available including:

  • Energy recovery wheel for superior energy savings (RVE)
  • Modulating hot gas reheat
  • High turndown furnace (patent pending)
  • Recirculation damper
  • Electronically commutated motor on the lead condenser fan
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ERCH

The ERCH combines the benefits of the total energy wheel with supplemental cooling and/or heating. The result is a product that is specifically designed to condition 100% outdoor air to desired supply conditions. Model ERCH offers a wide variety of configurable options from intake and discharge orientations to factory tested and proven control sequences.

  • 1,000 - 10,000 cfm
  • Up to 1.75 in. wg
  • Cooling options: packaged direct expansion, split direct expansion, chilled water, water-source heat pump, or evaporative cooling
  • Heating options: indirect gas, electric, hot water, or water-source heat pump
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ERT

Model ERT offers the benefits of a total energy wheel and cooling coil with a wrap-around heat pipe and/or heating. The result is a unit designed to be the most efficient product for conditioning humid outdoor air to near room conditions.

  • 2,000 - 10,000 cfm
  • Up to 1.75 in. wg
  • Cooling options: split direct expansion or chilled water
  • Heating options: electric or hot water
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APEX

APEX is a semi-custom energy recovery ventilator with optional heating and cooling. This rooftop unit offers an economical price compared to typical custom ventilators in this airflow range.

  • 10,000 - 20,000 cfm
  • Up to 2.5 in. wg
  • Cooling options: split direct expansion or chilled water
  • Heating options: electric or hot water
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Dedicated Outdoor Air Systems Controls

DOAS systems offer control options for efficient operation including integration into building management systems. These controls come pre-programmed from the factory and are easily configured in the field.

Learn more about DOAS controls.