46 Table 4.3 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 exhaust Fresh Outside Air Yes Min. outside air only Hybrid Ventilation Possible - Fuel Type Yes Natural gas and electricity Climate Zones Multiple 1-8 Typical Regions Multiple North America and Asia Applicable Building Programs Multiple Offices, retail, schools Table 4.4 System Performance Rating Metric Rating Comments Energy performance Systems with DOAS have high efficiency Thermal comfort Moderate degree of control over thermal comfort Acoustic comfort More pieces of equipment in zone making noise First cost More pieces of equipment to install Operating cost High energy efficiency decreases utility costs Maintenance Generally higher maintenance requirements Space requirements Small area requirements for pipes, some large equipment for heating and cooling
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