The Fujitsu GZ-12C is an industrial tube-style air conditioner manufactured by Fujitsu General. It is a one-piece unit with an inverter compressor, allowing it to run at lower-speeds, helping conserve energy. It is designed to be used in small commercial spaces, such as offices and retail stores, and provides a cooling capacity of up to 12,000 BTU/hour. It features a self-diagnosis function, allowing users to troubleshoot any issues that may be present with the unit. Additionally, it has an electric air filter, auto restart, and a built-in auto-changeover feature. Additionally, it has a slim slim design for easier installation and a noise-reduction system which offers quiet operation.