Something to think about on this topic: 70-80% of the energy used to move your 2 ton block of metals, composites, and flesh is lost to heat (depending on engine efficiency and other factors like regenerative breaking). There are of course other factors like large commercial AC systems that converge above the garage and other openings for air flow, but it takes a hell of a lot of energy to move a car and any heat not sucked away by the air moving through the intake is dumped into the garage. On a hot day, any cooling systems in the car are also prone to be less effective so you're "carrying" more heat into the garage than you would on a normal day.
As a radiography student I remember being impressed that something like 99.9% of the energy used trying to make x-rays off a tungsten target were actually just turned into heat. Then a pretty tricky engineering problem arises trying to dissipate it. Rotating anode, bigger anode, fancy liquid bearing, air cooled, water cooled, massive fans etc. And still I would run into the error message about too much heat!
