Hand dryers are electric machines found in public restrooms that dry the user’s hands by blowing warm air over them. An more sustainable and hygienic way to dry hands, hand dryers can be operated with the push of a button or function automatically via integrated sensors. Hand dryers are preferred as they remove paper waste, and require less maintenance and management compared to the disposal of paper towels. The earliest hand dryer was patented in 1921, and it was controlled by a floor pedal. New hand dryer models today aim to blast air unto both sides of the hand, pushing the water off, rather than evaporating it.
Hand dryers work once they are triggered by an optical sensor or button and use a heating element to dry hands. This healing element is typically a Nichrome wire. The air is blown over the heating element, and then blown out to the user where the water on damp hands is evaporated off.
In order to install a hand dryer start by removing the cover of the hand dryer with the wrench provided with the unit. Then attach the wall plate at each corner to the wall. Make sure all components are installed at the recommended height, and then connect the hand dryer to the circuit. Finish by testing out the hand dryer.
The earliest hand dryer was patented in 1921 by R.B Hibbard, D.J. Watrous, and J.G. Basset for Airdry Corporation of Groton New York. The electric hand dryer was invented by George Clemens in 1948 who founded World Dryer Corporation and created Model A, the company’s main model.