52 Table 5.1 Specifications Condition Status Allocation Heating System Yes COP = 0.8 – 0.95 Cooling System Yes COP = 4.0 – 6.0 Humidity Control Yes Dehumidification and humidification Ventilation Control Yes Mechanical ventilation with recirculation Fresh Outside Air Yes Min. outside air included in supply air Hybrid Ventilation Possible - Utility Connections Yes Natural gas and electricity Climate Zones Multiple 1-8 Typical Regions Multiple North America and Asia Applicable Building Programs Multiple Offices, retail, schools, large assembly spaces Table 5.2 System Performance Rating Metric Rating Comments Energy performance All-air systems have lower efficiency Thermal comfort Limited occupant controls on comfort Acoustic comfort Fewer pieces of equipment in zones making noise First cost Common system, fewer piecs of equipment Operating cost Low energy efficiency increases utility costs Maintenance Reliable system with less maintenance in zones Space requirements Large area requirements for air shafts and equipment
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