Supplying Climate Control Systems to the Vehicle Market for Over Half a Century.

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

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