Can you use an air cooler in a closed room?

With rising temperatures each year, more people are turning to air coolers as a cost-effective alternative to air conditioners. But a common question many first-time users ask is whether they can use an air cooler in a closed room. The short answer is no, at least not in a practical sense. Let us explore how air coolers work, why they require ventilation, and what happens when you operate them in a closed room.

How do air coolers work?

Air coolers use a more natural process called evaporative cooling. Here is a simplified breakdown of what happens inside an air cooler:

1. Hot air is drawn into the cooler from the environment.
2. This air passes through cooling pads that are soaked in water.
3. As the air passes over these pads, water evaporates, absorbing heat from the air.
4. The result? Cool, moist air is released into the room.

What happens if you use an air cooler in a closed room?

Using an air cooler in a sealed or closed room can lead to several problems:

·         Reduced cooling efficiency

In a closed space, there's no fresh air circulation. As the cooler continues to release moist air, humidity levels inside the room rise, making the air feel warmer and heavier rather than cooler.

·         Increased humidity

Evaporative coolers, such as desert coolers, add moisture to the air as part of their cooling mechanism. In a closed room, this leads to excess humidity, which can cause discomfort, sweating, dampness on walls, and the growth of mildew over time.

Use coolers with proper ventilation

The most crucial factor for successful air cooler use is airflow. Here's how to use an air cooler correctly:

Keep a window or door open

Air coolers require a steady supply of warm, dry air from outside to operate efficiently. Keep a window partially open near the unit to allow it to pull in fresh air. Simultaneously, keep another window or door open on the opposite side to allow moist air to escape.

Position it near a window

Place the cooler near a window so it draws in hot outside air. The cooler converts this hot air into a cooler breeze through its pads.

Tips to use air coolers effectively

To maximise your air cooler's performance, follow these pro tips:

·         Use ice or cold water

Most air coolers have ice compartments. Adding ice boosts the cooling effect, especially during extremely hot afternoons.

·         Clean the pads and tank regularly

Dirty cooling pads or stagnant water can reduce airflow and cause odours. Clean the cooler every 1–2 weeks during active use.

·         Use a ceiling fan

Pairing your personal air cooler with a ceiling fan helps circulate air more effectively and distribute the cooling more evenly.

Conclusion

While an air cooler can operate in a closed room, it will not cool the air effectively or maintain good air quality. Without ventilation, the room will feel more humid, less comfortable, and potentially damaging to walls and furniture over time.