Progen Holdings Ltd is a Singapore-based investment holding company. The Company is engaged in the design, supply, installation, and maintenance of air-conditioning and mechanical ventilation systems. The Company operates through four segments: products and installation, servicing and maintenance, rental, and property development. The products and installation segment relates to contracting of engineering works, cooling towers, air-conditioning and mechanical ventilation systems. The servicing and maintenance segment relates to servicing and repairing of air-conditioners, cooling towers and other cooling equipment. The rental segment relates to the leasing of factory and office space. The property development segment relates to the business of developing and selling residential properties undertaken by the associated company. Its subsidiaries include Progen Pte Ltd, D.B. Progen Servicing Pte Ltd, Polacel Manufacturing (S.E. Asia) Pte Ltd, Engpro Sdn Bhd and others.