Hand Dryer Drying Times
One of the biggest disadvantages of conventional hand dryers when compared to paper towels is the length of time they take to work fully. From start to finish, a conventional warm air hand dryer might take up to a minute to fully dry the user’s hands. Long drying times, coupled with loud noises mean that many businesses and schools choose paper towels which are more expensive, and worse for the environment.
Why warm air hand dryers take so long
Conventional evaporative hand dryers work by blowing slow moving air over a fan and onto the user’s hands. As this air passes over the skin, and the hands are rubbed together, the moisture slowly evaporates to leave the hands dry.
The time taken is a result of the balanced factors in hand drying. If the air moves too quickly, it does not allow sufficient heat to reach the skin, and if the heating is turned up too high, the air can be uncomfortably hot – as well as using significantly more electricity.
As a result of these design limitations, the time taken for a warm air hand dryer will always be quite long – between thirty seconds and one minute depending on the model.