So... they are dumping the heat where? outside? on a hot day? Efficient? Some kids need to look up the word and learn how to calculate it.
When you drive a car down the road (and ultimately stop), 100% of the energy in the gasoline is turned into heat and dumped into the atmosphere.
I imagine the plan is to dump the heat into the car's coolant system. It's the only logical place for it to go since liquid removes heat far more efficiently than air.
Where do you think a traditional AC unit dumps its heat? Surely you don't think it stores it away into a heat piggy-bank to be used when you turn the heater on in the winter...