Progen Holdings Ltd. is an investment holding company, which engages in the design, supply, installation, and maintenance of air-conditioning and mechanical ventilation systems. It operates through the following segments: Products and Installation, Servicing and Maintenance, and Rental. The Products and Installation segment refers to the contracting of engineering works, cooling towers, air-conditioning and mechanical ventilation systems. The Servicing and Maintenance segment is comprised of servicing and repairing of air-conditioners, cooling towers and other cooling equipment. The Rental segment is the leasing of factory and office space. The company was founded by Lee Ee in October 1981 and is headquartered in Singapore.