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2. Variable air volume - Wikipedia

   en.wikipedia.org/wiki/Variable_air_volume

   Another reason why VAV boxes save more energy is that they are coupled with variable-speed drives on fans, so the fans can ramp down when the VAV boxes are experiencing part load conditions. [6] [7] It is common for VAV boxes to include a form of reheat, either electric or hydronic heating coils. [4]

3. Dedicated outdoor air system - Wikipedia

   en.wikipedia.org/wiki/Dedicated_outdoor_air_system

   DOAS air handling unit with heat recovery wheel and passive dehumidification. A dedicated outdoor air system (DOAS) is a type of heating, ventilation and air-conditioning system that consists of two parallel systems: a dedicated system for delivering outdoor air ventilation that handles both the latent and sensible loads of conditioning the ventilation air, and a parallel system to handle the ...

4. Green Building XML - Wikipedia

   en.wikipedia.org/wiki/Green_Building_XML

   For example, Variable Air Volume (VAV) boxes are common components of a typical HVAC system. Defining a VAV box needs both the "HydronicLoop" tag and the "AirLoop" tag under the gbXML tag. Defining a VAV box needs both the "HydronicLoop" tag and the "AirLoop" tag under the gbXML tag.

5. Constant air volume - Wikipedia

   en.wikipedia.org/wiki/Constant_air_volume

   Constant air volume (CAV) is a type of heating, ventilating, and air-conditioning system. In a simple CAV system, the supply air flow rate is constant, but the supply air temperature is varied to meet the thermal loads of a space. [1] Most CAV systems are small, and serve a single thermal zone.

6. Glossary of HVAC terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_HVAC_terms

   HVAC (heating, ventilation, and air conditioning) is a major sub discipline of mechanical engineering. The goal of HVAC design is to balance indoor environmental comfort with other factors such as installation cost, ease of maintenance, and energy efficiency. The discipline of HVAC includes a large number of specialized terms and acronyms, many ...

7. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   Some types of terminal units are VAV boxes (single or dual duct), fan-powered mixing boxes (in parallel or series arrangement), and induction terminal units. Terminal units may also include a heating or cooling coil.