Fans and light fixtures designed for locations that are susceptable to direct exposure to the elements. They have been subjected to a water spray test by UL (Underwriter's Laboratories). During the test, fans are subjected to water spray in the direction most likely to cause water to enter. When installing a Wet Location fan, the outlet box mu [..]

A UL Listing specification for a lighting fixture: An interior or exterior location where water or other liquid can drip, splash, or flow on or against electrical equipment. Wet Location fixtures can be installed in bathroom showers and in outdoor applications where they come in direct contact with rain or water from sprinklers.