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Q: Science ( No Answer,   4 Comments )
Subject: Science
Category: Science > Chemistry
Asked by: mlentropy-ga
List Price: $2.00
Posted: 03 Apr 2006 19:15 PDT
Expires: 03 May 2006 19:15 PDT
Question ID: 715158
What takes more energy: Drying your hands with a paper towel, or an
electric blower? Which is a "cleaner" source of energy?
There is no answer at this time.

Subject: Re: Science
From: hardtofindbooks-ga on 03 Apr 2006 22:25 PDT
hi mlentropy

In terms of ongoing cost air drying is better than paper towel, see

however this calculation does not include the burden of manufacture
and disposal of the dryer, nor the disposal of paper waste
Subject: Re: Science
From: frde-ga on 04 Apr 2006 04:40 PDT
Nor does it take into account that they perform different tasks

Airdriers have been found to be colonies and distributers of bacteria
- and they are lousy at hand drying
Subject: Re: Science
From: hardtofindbooks-ga on 04 Apr 2006 18:03 PDT
@ Airdriers have been found to be colonies and distributers of bacteria

I do not think the balance of evidence supports this.

Studies pro-air or eqivalent for both methods, problems with paper:

Effects of 4 hand-drying methods for removing bacteria from washed
hands: a randomized trial.

Efficiency of hand drying for removing bacteria from washed hands:
comparison of paper towel drying with warm air drying.

Bacterial transfer and cross-contamination potential associated with
paper-towel dispensing.

A microbiological evaluation of warm air hand driers with respect to
hand hygiene and the washroom environment.

Comparative effectiveness of hand-cleansing agents for removing
methicillin-resistant Staphylococcus aureus from experimentally
contaminated fingertips.

Hot air electric hand driers compared with paper towels for potential
spread of airborne bacteria.

Studies pro-paper:

Dispersal of bacteria by an electric air hand dryer.

These are "neutral" medical studies. You can find plenty of other
reports on the Internet and elsewhere concluding either way sponsored
by companies on one side or the other.
I am always happy to invest the extra 20 seconds to dry my hands
properly if the method is air. From personal observation the majority
of people do not either wash or dry optimally, irrespective of method.
Subject: Re: Science
From: frde-ga on 05 Apr 2006 04:30 PDT
I'll certainly agree with your last statement !

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