Blue Star Limited operates as a heating, ventilation, air conditioning, and commercial refrigeration (HVAC&R) company in India. It operates through three segments: Electro-Mechanical Projects and Commercial Air Conditioning Systems; Unitary Products; and Professional Electronics and Industrial Systems. The Electro-Mechanical Projects and Commercial Air Conditioning Systems segment engages in the design, installation, and maintenance of central air conditioning systems, including packaged, ducted systems, variable refrigerant flow units, scroll chillers, screw chillers, centrifugal chillers, and data center chillers. This segment provides turnkey contracting services for mechanical, electrical and plumbing, and firefighting sectors, as well as value-added services, such as retrofitting, system upgrades, and ongoing operational support. Its Unitary Products segment is involved in the development, manufacture, and distribution of air conditioners for commercial and residential use, as well as the provision of commercial refrigeration solutions, cold chain equipment, air purifiers, and air coolers. The Professional Electronics and Industrial Systems segment trades in and services testing machines, medical, analytical, test and measuring, data communications, and industrial products and systems. The company also exports its products to the Middle East, Africa, SAARC, and ASEAN regions. Blue Star Limited was founded in 1943 and is headquartered in Mumbai, India.