Estimated Performance Guidelines The following performance guidelines are based on test conditions outlined under "A/C System Operational Check for Evans Midway and High Performance Systems". Variables such as engine speed, condenser airflow, sun load, blower motor speed, and chassis voltage will all affect A/C system performance. Air Temperature (F) Entering A/C Unit Inlet - Outlet Air Temperature Differential** FRESH OR RECIRCULATED LOW HUMIDITY HIGH HUMIDITY 50 5-10 5-10 60 10-20 10-15 70 20-25 15-20 80 25-30 20-25 90 25-35 20-30 100 30-35 25-30 110 35-40 30-35 ** The outlet louver closest to the A/C unit usually discharges the coldest air. The warmest inlet air temperature (fresh or recirculated) should also be used for the Differential calculation. A/C System Operating Pressures Ambient Air Temp (F) Entering Condenser Suction Pressure (PSIG) @ Evaporator Outlet Discharge Pressure (PSIG) @ Compressor Outlet 50 5-15 75-125 60 5-15 100-150 70 10-20 125-175 80 10-20 150-225 90 15-25 175-250 100 15-25 200-275 110 15-30 225-325 Go Back to Technical Support