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Alt NEUDORFER <br />ENGINEERS <br />AN Ctegra COMPANY <br />Terms and Abbreviations <br />AHU Air Handling Unit <br />FH Fume Hood <br />OED Open Ended Duct <br />ACU Air Conditioning Unit <br />FHT Fume Hood Test <br />OSA Min. Outside Air Minimum <br />ACCU Air Cooled Condensing Unit <br />FG Floor Grille <br />OAT Outside Air Temperature <br />Adj. P.D. Adjusted Pitch Diameter <br />F.E. Floor Exhaust or Return <br />PD / Ap Pressure Drop <br />AFMS Airflow Monitoring Station <br />FLA Full Load Amperage <br />pF Power Factor <br />AMP Amperage <br />FM Flow Meter <br />PHC Preheat Coil <br />AVG. Average <br />FPB Fan Powered Box <br />PH Phase (s) <br />BD Balance Damper <br />FpM Feet Per Minute <br />PICV Press. Independent Control Valve <br />BET Building Envelope Test <br />FS <br />pMP Circulating Pump <br />BHp Brake Horsepower <br />FSCAL Flow Sensor Calibration <br />pp Perforated Plate <br />BMS Building Management System <br />FSD Fire Smoke Damper <br />PSI Pounds Per Square Inch <br />BOS Bottom of Sheave <br />FSR Floor Supply Register <br />PSIA PSI Absolute <br />BSC Bio Safety Cabinet <br />FT Feet, Foot <br />PSIG PSI Gauge <br />BTU British Thermal Unit <br />FTHD Feet of Head <br />PT Pitot Traverse <br />BTUh BTU / Hour <br />FTU Fan Terminal Unit <br />RA Return Air <br />BV Balance Valve <br />GFH Gas Fired Heater <br />RAT Return Air Temperature <br />BVFM Balance Valve Flow Meter <br />GFHC Gas Fired Heating Coil <br />RAID Return Air Damper <br />CAV Constant Air Volume <br />GIRD Grille, Register, Diffuser <br />RF Return Air Fan <br />CBV Calibrated Balance Valve <br />GPM Gallons Per Minute <br />RG Return Grille <br />CD Ceiling Diffuser <br />HC Heating Coil <br />RHC Reheat Coil <br />CIF Correction Factor (also Ak) <br />HEPA High Eff. Particulate Absorbing <br />RH Relative Humidity <br />CFLA Corrected Full Load Amps <br />H.F. HEPA Filter <br />RR Return Register <br />CFM Cubic Feet Per Minute <br />HOA Hand/Off/Auto Switch <br />RPM Revolutions Per Minute <br />C.E. Ceiling Exhaust <br />HP Horsepower <br />RTU Roof Top Unit <br />CEF Ceiling Exhaust Fan <br />HpS High Pressure Steam <br />RVA Rotating Vane Anemometer <br />CH Chiller <br />HRC Heat Recovery / Reclaim Coil <br />SA Supply Air <br />CHWR Chilled Water Return <br />HRU Heat Recovery Unit <br />SAT Supply Air Temperature <br />CHWS Chilled Water Supply <br />HTR O.L. Overload Protection (Motors) <br />SD Supply Diffuser <br />C.R. Ceiling Return <br />HVAC Heating, Ventilation & Air Cond. <br />SEF Smoke Exhaust Fan <br />CT Cooling Tower <br />HWR Hot / Heating Water Return <br />SF (Air) Supply Fan <br />CU Condensing Unit <br />HWS Hot / Heating Water Supply <br />S.F. Service Factor (Electrical) <br />CWR Condenser Water Return <br />HX Heat Exchanger <br />SHC Steam Heating Coil <br />CWS Condenser Water Supply <br />Hz Hertz, Cylcles per Second <br />SNKL Snorkel Inlet <br />CV Constant Volume <br />ID Inside Diameter <br />Sp -WC Static Pressure in. W.C. <br />Cx Commissioning <br />In/S Inches Per Second <br />sq.ft. (Area) Square Feet <br />DB Dry Bulb <br />in, W.C. Inches Water Column <br />SR Supply Register <br />d6 Decibel Level <br />Kfactor Correction Factor of Free Area <br />SWE Sidewall Exhaust <br />dB(A) A Weighted Decibel Level <br />KW Kilowatts <br />SWG Side Wall Grille <br />D.D. Direct Drive <br />LAT Leaving Air Temperature <br />SWR Sidewall Return / Register <br />DDC Direct Digital Controls <br />LD Linear Supply Diffuser <br />SWS Sidewall Supply <br />Des. Design <br />LPS Low Pressure Steam <br />TAB Test, Adjust, & Balance <br />DIA Diameter <br />LRD Linear Return Diffuser <br />TDH Total Dynamic Head <br />DNL Data Not Listed <br />LSD Linear Slot Diffuser <br />TOS Top of Sheave <br />DOAS Dedicated Outside Air System <br />LT Light Troffer <br />TSp Total Static Pressure <br />Dip Differential Pressure <br />LWG Low Wall Grille <br />TU Terminal Unit <br />DTC Dual Temperature Coil <br />LWR Low Wall Return <br />UH Unit Heater <br />DVA Demand Ventilation Air <br />LWT Leaving Water Temperature <br />ULPA Ultra Low Particle Air (Filter) <br />EA Exhaust Air <br />MAD Mixed Air Damper <br />V Volts <br />EAD Exhaust Air Damper <br />MAU/MUA Make Up Air / Unit <br />VAV Variable Air Volume <br />EAT Entering Air Temperature <br />MBH 1000 Btu's Per Hour <br />VEL Velocity <br />ECM Electronically Commutated Motor <br />MVD Manual Volume Damper <br />VD Volume Damper <br />ECONA Economizer Air <br />NA Not Applicable <br />VFD Variable Frequency Drive <br />EDH Eclectic Duct Heater <br />N/ACC Not Accessible <br />VP Velocity Pressure <br />EF Exhaust Fan <br />NC Noise Criteria <br />VSC Variable Speed Controller <br />EG Exhaust Grille <br />NS Not Specified <br />VVT Variable Volume Terminal <br />EMCS Energy Mgt. Control System <br />NPSH Net Positive Suction Head <br />W Watts <br />ER Exhaust Register <br />NPSHA Net Positive Suction Head Avail. <br />WB Wet Bulb <br />ERV / ERU Energy Recovery Ventilator / Unit <br />NPSHR Net Positive Suction Head Req. <br />W.G. Water Gauge <br />ESP External Static Pressure <br />NZ Nozzle <br />OP Differential (Delta) Pressure <br />EWT Entering Water Temperature <br />OAD Outside Air Damper <br />AT Differential (Delta) Temperature <br />FCU Fan Coil Unit <br />OBD Opposed Blade Damper <br />VA Ventilation Air <br />Project 2024-1113 Page 31 of 49 <br />