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Kittitas County Courthouse Energy Audit AKANA <br />HVAC Heating, Ventilation, and Air Conditioning (system) —the equipment, distribution <br />systems, and terminals that provide, either collectively or individually, the <br />processes of heating, ventilating, or air conditioning to a building or portion of a <br />building. <br />HW Hot water not exceeding 160 psig or at temperatures not exceeding 250°F. <br />IAQ Indoor Air Quality —attributes of the respirable air inside a building (indoor <br />climate), including gaseous composition, humidity, temperature, and <br />contaminants. <br />MA Mixed Air —(1) air that contains two or more streams of air. (2) combined outdoor <br />air and recirculated air. <br />MAU Makeup Air Unit —air -handling unit that provides 100% outdoor air to offset air <br />that is exhausted and exfiltrated, often providing conditioning or treatment of the <br />outdoor air. <br />RA Return Air —air removed from a space to be recirculated or exhausted. Air <br />extracted from a space and totally or partially returned to an air conditioner, <br />furnace, or other heating, cooling, or ventilating system. <br />RCx Retro-Commissioning—the commissioning process applied to an existing facility <br />that was not previously commissioned. The same process for retro-commissioning <br />needs to be followed from predesign through occupancy and operations to <br />optimize the benefits of implementing the commissioning process philosophy and <br />practice. <br />SA Supply Air —(1) air delivered by mechanical or natural ventilation to a space, <br />composed of any combination of outdoor air, recirculated air, or transfer air. (2) <br />air entering a space from an air-conditioning, heating, or ventilating apparatus for <br />the purpose of comfort conditioning. Supply air is generally filtered, fan -forced, <br />and either heated, cooled, humidified, or dehumidified as necessary to maintain <br />specified conditions. Only the quantity of outdoor air within the supply airflow <br />may be used as replacement air. <br />UH Unit Heater —heater consisting of a fan for circulating air over a heat exchange <br />surface, all enclosed in a common casing. <br />VFD Variable Frequency Drive —electronic device that varies its output frequency to <br />vary the rotating speed of a motor, given a fixed input frequency. Used with fans <br />or pumps to vary the flow in the system as a function of a maintained pressure. <br />Project Number 22-084 <br />October 28, 2025 <br />