Does air cooler really cool the room?

An air cooler can effectively cool a room. Air coolers, also known as evaporative coolers or swamp coolers, work by using water evaporation to cool the air. They draw in hot, dry air from outside or the room, pass it over water-saturated pads, and then blow the cooled, moistened air back into the room.

The process of evaporation requires energy, which is absorbed from the surrounding air, causing it to cool. The cooler, moister air is then circulated through the room, providing a cooling effect.

However, it's important to note that air coolers work best in dry climates with low humidity levels. In humid environments, the air already contains a lot of water vapor, which reduces the effectiveness of the evaporation process. Additionally, air coolers can increase the humidity level in the room, which some people may find uncomfortable.

Overall, air coolers can be an effective and energy-efficient way to cool a room, especially in dry climates. However, they may not be the best choice for everyone or every situation.