Summary: You can save water and save energy with an automatic faucet because an automatic faucet control prevents wasting hot or cold water.
There are a variety of automatic faucets available requiring a different levels of installation expertise.
Most automatic faucets require a small amount of electricity to function. Some can be operated using a standard outlet, some can run off of batteries, while other must be hard wired.
For people who have trouble turning the handles, or who always forget and leave the water running, an Automatic Faucet Control is worth considering.
Automatic faucets can also improve cleanliness and eliminate cross-contamination by keeping hands (and germs) away from kitchen faucets and bath faucets.
Photos courtesy of Electronicfaucets.com
There are many residential designs available and even older faucets can be retrofitted with an automatic control device.
For more information on automatic faucets and automatic faucet controllers including cost, read the Nation Association of Home Builders Research Center' article on Automatic Faucet Controllers.