Heating, ventilating and air conditioning (HVAC) can be accomplished in a number of ways, utilizing an array of a number of the many components available to the designer.
Air conditioning systems are typically classified by the location of the mechanical equipment used to supply the cooling function -- central systems, unitary systems, special systems. In other words, the refrigeration equipment can be located at a central site, or multiple cooling units can be dispersed throughout one or more buildings.
Depending on the building needs and the HVAC budget, the designer typically has the choice of grouping these components in several general arrangements including:
- Central Systems
- Central plant where the distribution medium (usually water) is chilled and/or heated and piped to a number of different buildings containing one or more delivery subsystems.
- Central system where the distribution medium (usually water) is chilled and/or heated at a central point within the building and piped or ducted to various control zones.
- Unitary Systems
- Distributed, decentralized or multiple unitary systems utilize a multiple of HVAC units within a building, interconnected and/or controlled in some fashion.
- Modular systems consist of a multiple of individual HVAC units within a building, not interconnected and/or controlled.
- Special Systems
- Utilizing specific technologies to meet specialized needs; examples are desiccant systems, thermal storage systems, or other system enhancements.
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