Cold air hand dryers are considered to be more hygienic than hot air hand dryers and the reason for this is the hygienic benefits of cold plasma. Cold plasma has antimicrobial properties which kills bacteria and germs and it has been found to be so effective that it has been used to treat infections and heal wounds.

Hand dryers use hot air instead of just air because hand dryers are work by using a heating element. So the air comes from the hand dryer is hot it blows onto your hands, water evaporates quickly. Hot air dryers are more efficient devices and also energy-efficient.

How hot does a hand dryer get? Hand dryers usually generate heat up to 50°F above ambient temperature.