During the summer a high degree of ambient air humidity, even at moderate temperatures, can make a room feel hot and stuffy.

A dehumidifier reduces indoor humidity without affecting the room temperature, by mixing dry cool air with warm air to produce comfortable dry air. Features like reheating humidification prevent overcooling, which is particularly appreciated by people who are sensitive to cold.

If the indoor temperature becomes too high, humidity levels are reduced also reducing temperature (cooling dehumidification).