A spin dryer is an energy-efficient dryer that centrifuges the water out of clothes. These dryers are generally much smaller than a regular clothes dryer and don't use heat to dry clothes — they use centrifugal force instead. Using a spin dryer can be a convenient and easy way to save energy and time. Most spin dryers plug into a standard outlet. When turned on, the dryer will spin at approximately 3200 revolutions per minute (RPMs) for two to three minutes. In this time, the amount of water removed from the clothes is generally equivalent to running a conventional dryer for 25-35 minutes. The clothes are generally not dry when they come out of spin dryers; they usually only need to be tossed into a conventional heat or tumble dryer for a few more minutes. Another option is to hang the clothes up to finish drying. Either way, this will cut down on the amount of electricity or natural gas used to dry clothes.