Gordon,
 The actual evaporator temperature of any automotive A/C system MUST stay
at or above 32 degrees. Below this point, the condensate water will
freeze and block airflow through the evaporator. Most systems have a
sensor which will shut down the compressor if the evaporator temp drops
below 32 degrees Fahrenheit.

R-12 Freon will drop the temperature of the ambient air approx. 20
degrees in a well designed system. With the A/C system set to Max (or
recirculate) the same interior air gets passed through the system again
and again. This is how the temperature in the car will drop from 140
degrees ( here in S. Fla.) of a parked car, to a comfortable 65-75
degrees.

Charlie Kuss
RV-8A fuselage
Boca Raton, Fl.

Do you know of any suplyers that carry kits for auto  AC units ready to
install and which ones are the smallest? The marine industry has many all
in one package units like that,  but they are water cooled.
Bulent

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