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In order to reduce the development cycle of a vehicle HVAC system, the evaluation and testing of the vehicle HVAC components and systems as well as the methods to shorten the design process have been extensively studied. In this paper, we focused on the experimental studies and software developments for vehicle HVAC evaporators, heater coils, and blower wheels only. We introduced the SAE testing specifications for commercial vehicle HVAC componenets and systems. Based on the SAE HVAC testing specifications and experimental studies, we proposed the normalization approaches for evaluation of evaporators and heater coil components. The computational examples for off-highway vehicle applications have been discussed. The results represent that the normalization and evaluation approaches are effective.