Blue Star Ltd. engages in the manufacture, trade, and installation of air conditioning systems. It operates through the following segments: Electro-Mechanical Projects and Packaged Air Conditioning Systems; Unitary Products; and Professional Electronics and Industrial Systems. The Electro-Mechanical Projects and Packaged Air Conditioning Systems segment designs, manufactures, installs, comissions and maintain the central air conditioning plants, packaged and ducted systems and vairable refigerent flow systems, as well as contracting services in electrification, plumbing and fire-fighting. The Unitary Products segment offers a wide variety of air conditioners, water purifiers, air purifiers, air coolers, commercial refrigeration products and cold chain equipment for both residential and commercial applications. The Professional Electronics and Industrial Systems segment manufactures electronic equipment and services, as well as industrial product and systems. The company was founded by Mohan T. Advani in 1943 and is headquartered in Mumbai, India.