Mitsubishi Electric is a world leader in air-conditioning systems for residential, commercial and industrial use. Our efforts to make indoor life more comfortable began in 1921, with the introduction of an electric fan. It became an instant hit, and a little over 10 years later we started making coolers. The challenge of creating air-conditioning systems suitable to Japan's wide-ranging climate conditions led us to the development of amazingly sophisticated yet rugged machines and systems that can take the punishment of constant use in virtually any condition on earth. And do so quietly, energy-efficiently and with minimum negative impact on the environment. For years and years on end.