I'm not sure that will allow me to compare apples and apples. There will be some info the user (or me somehow enetering it in table format for each model) gathering cabin volume and glass area. Then I hope by monitoring temperature changes over time, the other coefficients,fan curves, constants, etc. can be determined by analyzing what data can be obtained. Start the car park it in the shade and when coolant temp is right and whatnot, push the 'calibrate' button. After some time it may prompt for another run with different conditions. Once the coefficients are obtained, maybe only slight tuning would be required later, and the car would be ready to tackle dynamic situations like everyday use, using those constants, sunload, and temps to drive the door and the fan automatic-style.
And I might add so are you
Edit: I want to let it be known that I'm not ignoring humidity, but right now I have enough on my plate, that will come with time, it all will.