Portable Air Coolers for Rooms: How to Choose by Space

Start with the manufacturer's coverage guidance, then check airflow and the assumed conditions. Also account for ceiling height, ventilation and local humidity; square metres alone may not predict comfort.

That depends on airflow, room layout and climate. Compare the model's documented coverage and remember that evaporative coolers need ventilation and are less effective in humid air.

Evaporative models generally need a way for humid air to escape. A closed room can become more humid and reduce the effectiveness of evaporation.

A larger tank can reduce refill frequency, but it does not by itself indicate stronger airflow or greater room coverage. Compare both tank and airflow specifications.