Mitsubishi Electric helped pioneer the mini-split (or ductless) technology as a means of providing Japan's growing population with a highly efficient way to cool and heat their homes and businesses. They designed the Mr. Slim system to fit into spaces that could not otherwise have been effectively heated or cooled due to the close proximity of Japan's buildings, plus they needed a system that was extremely quiet.

For more than 27 years, Mitsubishi Electric HVAC Advanced Products Division, with headquarters in Suwanee, Ga., has been a leading marketer of intelligent air-conditioning and heating technology, manufactured by its parent corporation, Mitsubishi Electric. Originally established to market air-conditioning and heating systems in North America, the division has expanded its market distribution to include Latin America, the Caribbean and Bermuda. A 2004 survey by ACH&R News listed Mitsubishi Electric as contractors’ most preferred ductless manufacturer and the number one brand in price/value, availability, reliability and performance specifications.