You have arrived the heat, and in Spain we notice but based on well. Take a trip in mid – afternoon, or back to the car after having left it parked in the sun, you can assume little more than a faint heat that can accumulate inside the car, like a greenhouse.
Today there are very few cars not equipped with air conditioning, or any variant technologically similarly, call it what you call: manual climate control, automatic climate control, electronic climate control, dual zone climate control, Trizone, cuatrizone … Essentially we always refer a cold machine. Let’s see briefly how it works, and above all, how much you spend.
Take hot air, cool it and put it in the passenger compartment
At this point no one should be surprised if we say that the air conditioning consumes energy, or in other words, in a petrol or diesel car consumes (or gas, or whatever you use your car to get around). They are whims of physics and thermodynamics in particular, but to do a job (with frictions, resistances, losses, etc.) have no choice but to consume energy.