1930 – The “car cooler” uses the evaporation of water (rather than your own sweat) to cool air, which is then blown in through the open passenger-side window. Though it’s the first item to actually lower the air temperature, it only works in areas with very low humidity – and it looks like you have a vacuum cleaner strapped to the side of your car.

They existed, but it took until the 1960s to become common in upper class models.