Additionally, air hand dryers may not effectively dry hands, leaving them damp and more susceptible to bacterial growth and cross-contamination. This can contribute to an unhygienic washroom environment. Finally, air hand dryers are a slow way to dry hands compared to paper towels.

A conventional hand dryer dries hands by warm air. The air speed is relatively low and so does the noise level. A high speed hand dryer dries hands by air speed. It literally blows water away. It uses less power as it focus on air speed rather than air temperature (heating element).