40% and 60% of the dehumidifier indicate the set value of the indoor humidity. These two values are the relative humidity range that the user wants the dehumidifier to maintain the indoor humidity.

40% :

This is the lower limit of indoor humidity set by the dehumidifier. When the indoor humidity drops below this set value, the dehumidifier usually stops working to avoid too low indoor humidity resulting in too dry air. This is because too low humidity may have adverse effects on human health, such as causing dry skin and throat irritation.

60% :

This is the upper limit of indoor humidity set by the dehumidifier. When the indoor humidity is higher than this set point, the dehumidifier will start working to remove moisture from the air through condensation or other techniques, thereby reducing the indoor humidity. High humidity environment is easy to breed mold and bacteria, posing a threat to human health, but also affect the service life of furniture and appliances.

These two setpoints are usually determined according to the comfortable humidity range of the human body. Generally speaking, the humidity range that the human body feels most comfortable is roughly between 40% and 60%. In this humidity range, it can not only prevent indoor humidity, avoid mold breeding, but also maintain the comfort of indoor air, which is more beneficial to human health.

What do 40% and 60% of dehumidifiers mean?

40% :

60% :