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TESTING ANO Ca <br />SI 11VICI S <br />AABC <br />PF <br />POWER FACTOR <br />PHC <br />PREHEAT COIL <br />PHC <br />PHASE (S) <br />PMP <br />CIRCULATING PUMP <br />P.P <br />PERFORATED PLATE <br />PSI <br />POUNDS PER SQUARE INCH <br />P.T. <br />PITOT TRAVERSE <br />RA <br />RETURN AIR <br />RF <br />RETURN AIR FAN <br />R.G. <br />RETURN GRILLE <br />RHC <br />REHEAT COIL <br />RPM <br />REVOLUTIONS PER MINUTE <br />SA <br />SUPPLY AIR <br />SAT <br />SUPPLY AIR TEMPERATURE <br />S.D. <br />SUPPLY DIFFUSER <br />SEF <br />SMOKE EXHAUST FAN <br />SF (AIR) <br />SUPPLY FAN <br />S.F. (ELECT) <br />SERVICE FACTORS <br />SHC <br />STEAM HEATING COIL <br />S.P. "W.C." <br />STATIC PRESSURE RESISTANCE, MEASURED IN <br />INCHES OF WATER COLUMN <br />S.W.E. <br />SIDEWALL EXHAUST <br />S.W.R. <br />SIDEWALL RETURN <br />S.W.S. <br />SIDEWALL SUPPLY <br />TAB TESTING, ADJUSTING, AND BALANCING <br />TSP TOTAL STATIC PRESSURE <br />UH UNIT HEATER <br />V <br />VOLTS <br />VAV <br />VARIABLE AIR VOLUME <br />VD <br />VOLUME DAMPER <br />VFD <br />VARIABLE FREQUENCY DRIVE <br />VP <br />VELOCITY PRESSURE <br />W WATTS <br />WB WET BULB <br />W.G. WATER GAUGE <br />OF DEGREES FAHRENHEIT <br />DP DIFFERENTIAL (DELTA) PRESSURE OR PRESSURE <br />DROP <br />DT DIFFERENTIAL (DELTA) TEMPERATURE, NET <br />TEMPERATURE DECREASE OR INCREASE <br />PSI POUNDS PER SQUARE INCH <br />04/23/2024 <br />Page 7 of 10 <br />