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<br />HHWR Heating Hot Water Return <br />HHWS Heating Hot Water Supply <br />HL High Limit <br />HPS High Pressure Steam <br />HR Heat Recovery <br />HRU Heat Recovery Unit <br />HRV Heat Recovery Ventilator <br />HSPF Heating Seasonal Performance Factor <br />HVAC Heating Ventilation and Air Conditioning <br />HWP Hot Water Pump <br />HWR Hot Water Return <br />HWS Hot Water Supply <br />HWRT Hot Water Return Temperature <br />HWST Hot Water Supply Temperature <br />HX Heat Exchanger <br />I/O Input Output <br />IAQ Indoor Air Quality <br />IPMVP International Performance Measurement and Verification Protocol <br />IR Infra-Red <br />LAT Leaving Air Temperature <br />LHV Lower Heating Value <br />LL Low Limit <br />LON Local Operating Network <br />LP Low Pressure <br />LPS Low Pressure Steam <br />LRA Locked Rotor Amps <br />LWBT Leaving Wet Bulb Temperature <br />LWT Leaving Water Temperature <br />M&V Measurement and Verification <br />MA Mixed Air <br />MAT Mixed Air Temperature <br />MCC Motor Control Center <br />MUA Make-up Air Unit <br />MX Metrix Utility Accounting System <br />MZ Multi-Zone <br />NC Normally Closed <br />NEMA National Electrical Manufacturers Association <br />NO Normally Open <br />NPSH Net Positive Suction Head <br />OA Outside Air <br />OAP Outside Air Percentage <br />OAT Outside Air Temperature <br />ODP Open Drip Proof <br />OWS Operator Work Station <br />PC Performance Contracting <br />PE Professional Engineer <br /> ASHRAE LEVEL 1 ENERGY AUDIT ADMINISTRATION VIII <br /> <br />