About 3 years, but longer if they have a heart bypass.
Commercial hand dryers can be purchased from many sources online and come in many styles and price ranges. A good selection can be found at http://www.hygienesuppliesdirect.com/sub/hand_dryers
There is a chance, but modern hand dryers have fail-safes that shut down the device if it overheats.
All non-commercial dryers that I am aware of (in the US) require 240V single-phase power. Some large commercial dryers require 3-phase power.
There are some air hand dryers for personal use, but you'll have to buy them through commercial channels, and they won't be cheap when not bought in bulk.
Amazon.com carries a few air hand dryers, with one as low as $45. Sears and several office supplies stores also carry hand dryers, albeit they may be pricier.
ProDryers.com has a large selection of commercial hand dryers in many different colors and styles. Orders can be placed over the phone or online through their website. They also offer free shipping within the continental United States.
A compressed air dryer is a device for removing water vapor from compressed air. Compressed air dryers are commonly found in a wide range of industrial and commercial facilities.
You can buy air hand dryers in bulk from commercial retailers that focus on hygiene equipment. You can also buy these products directly from the manufacturer, such as Dyson.
You can by electric hand dryers online through major distributors that focus on commercial products or directly from the retailer (like Dyson). There are generally not sold on consumer retail websites.
In 2011 the average commercial company takes between 3-6 months to pay out.
Hand dryers for restaurants can be found at many online stores that specialize in hand dryers, such as www.handdryerworld, or www.webstaurant.com. You can also purchase them at your local commercial restaurant supply store. There are several online retailers for hand dryers,the electric kind are considered to be more eco friendly. The would suggest ordering from a reputable retailer like www.Handdryersandmore.com . Contact the business in your area that deals in restaurant FFE: furniture, fixtures, equipment. If it doesn't offer hand-dryers, it can surely direct you to the party in your area that does.
The newest energy saving standard for commercial hand dryer is Excel XLERATOR. this handdryer can be purchased at a variety of websites including handdryer.com, prodryer.com, americandryer.com, etc