Dedicated Outdoor Air Systems (DOAS) use separate equipment to condition all of the outdoor air brought into a building for ventilation and deliver it to each occupied space, either directly or in conjunction with local or central HVAC units serving those same spaces.
A DOAS unit can be simple, with just a few components (e.g., a fan and a cooling coil), or more complex, with several energy recovery devices, cooling coils, heating coils, and one or more fans. Generally, the objective of a DOAS is to condition incoming outdoor air before it mixes (and is diluted) with the remainder of the building so that it is easier to dehumidify and clean, and so that energy in outgoing air can be recovered to precondition incoming outdoor air.
Where are DOAS systems used?
A DOAS can be effectively incorporated into nearly any commercial, institutional, industrial, or multifamily building. Although all building types can benefit from DOAS, those with strict requirements for indoor air quality, ventilation, humidity, or energy efficiency make particularly good candidates.
Following are the supported systems that have a DOAS unit:
DOAS w/FCU, with ASHP and Air Cooled Chiller
DOAS w/FCU, with ASHP and Water Cooled Chiller
DOAS w/FCU, with ELectric Boiler and Air Cooled Chiller
DOAS w/FCU, with Electric Boiler and Water Cooled Chiller
DOAS w/FCU, with Electric Resistance and Air Cooled Chiller
DOAS w/FCU, with Electric Resistance and Water Cooled Chiller
DOAS w/FCU, with GSHP
DOAS w/FCU, with Gas Boiler and Air Cooled Chiller
DOAS w/FCU, with Gas Boiler and Water Cooled Chiller
DOAS w/Induction, with ASHP and Air Cooled Chiller
DOAS w/Induction, with ASHP and Water Cooled Chiller
DOAS w/Induction, with ELectric Boiler and Air Cooled Chiller
DOAS w/Induction, with Electric Boiler and Water Cooled Chiller
DOAS w/Induction, with Electric Resistance and Air Cooled Chiller
DOAS w/Induction, with Electric Resistance and Water Cooled Chiller
DOAS w/Induction, with GSHP
DOAS w/Induction, with Gas Boiler and Air Cooled Chiller
DOAS w/Induction, with Gas Boiler and Water Cooled Chiller
DOAS w/Radiant, with ASHP and Air Cooled Chiller
DOAS w/Radiant, with ASHP and Water Cooled Chiller
DOAS w/Radiant, with ELectric Boiler and Air Cooled Chiller
DOAS w/Radiant, with Electric Boiler and Water Cooled Chiller
DOAS w/Radiant, with Electric Resistance and Air Cooled Chiller
DOAS w/Radiant, with Electric Resistance and Water Cooled Chiller
DOAS w/Radiant, with GSHP
DOAS w/Radiant, with Gas Boiler and Air Cooled Chiller
DOAS w/Radiant, with Gas Boiler and Water Cooled Chiller
DOAS w/VRF, with Electric Boiler and Cooling Tower
DOAS w/VRF, with Gas Boiler and Cooling Tower
DOAS w/VRF, with Ground Source
DOAS w/WSHP, with Electric Boiler and Cooling Tower
DOAS w/WSHP, with Gas Boiler and Cooling Tower
DOAS with VRF
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