When used, it puts out nearby Fires and reduces body temperature of the player by 50°, potentially causing the player to start Freezing if their temperature is low enough. However, it will never reduce the temperature below 2.5° in the Shipwrecked DLC.
Due to the range of its effect, the Luxury Fan is a good substitute for the Ice Flingomatic to put out fires during Summer, however, if the player starts in Spring, this might be unavailable, due to the Moose/Goose not spawning unless changed in the settings.
Don't Starve Together
In Don't Starve Together, the Luxury Fan will cool down all nearby players when used. Additionally, it will never reduce the temperature below 2.5°.
The Luxury Fan used to be called the "Down Thermantidote" and was directly dropped by the Moose/Goose.
Thermantidote is a portmanteau of the words "Thermal" and "Antidote".