To be honest, I myself once wondered: why do some drivers press two window buttons at the same time? It would seem that it is enough to press one – and the window will go down or up.

But over the years of driving, I realized that this seemingly strange technique has its reasons.

First, it’s a question of ventilation speed. When the car is as hot as a furnace in the summer, I sometimes roll down the front and rear windows simultaneously on one side or even diagonally.

If you press two buttons at once, the air starts to flow through the cabin faster. A kind of draft is created, which literally in a minute drives hot air out. One open vent will not give such an effect.

Secondly, it reduces the pressure in the cabin. When you close the doors or windows one by one, you feel a slight “blow” of air. And if you open or close two windows at the same time, the pressure equalizes more smoothly.

I especially notice this on the highway when I’m driving at speed – it’s less annoying and there’s no more of that dull thud.

There is another point – combating fogging. In winter or during rain, I can slightly open two windows at the same time, literally by a few centimeters.

This way, the air circulates more evenly and moisture leaves the cabin faster. If you open only one, the effect is weaker.

Some people think that drivers hold down two buttons “to save time” or out of habit. This is partly true. When you’re behind the wheel every day, the movements become automatic. If you need to quickly open several windows, it’s easier to press two buttons at once than to do it one by one.

But I would warn you: not all cars should abuse this technique. If the electrical system is old or the battery is dead, the simultaneous load on two window motors may be unnecessary.

In modern cars this is well thought out, but in older cars it is better to proceed with caution.

So when you see a driver pressing two buttons at once, it’s not a strange quirk. More often than not, it’s a common practice to ventilate the cabin faster, equalize pressure, or get rid of fogging.

I do this consciously — and now I know exactly why.