Fans are categorized into three different location ratings – Dry, Damp, and Wet.
Ceiling fans with a dry location rating are suitable for indoor installation only and should not be installed in a high humidity environment such as a bathroom.
Ceiling fans with a damp location rating can be installed in any indoor setting or covered outdoor locations such as covered porches.
Ceiling fans with a wet location rating can be installed in any indoor or outdoor setting, including those where direct contact with water would be likely.