No take it easy buddy it just so happens that I have been doing commercial and industrial HVACR for about 25 years and its all the same just different refrigerants and configurations. BTW have anyone noticed on these cars when you have selector switch in either defog/defrost or at your feet the AC compressor starts defrost i understand because that pretty much what a AC system is is a de-humidifier but why when its set to blow at your feet. Only reason I say this is to try and help gas consumption no need for hot dry air down their for you northerners.