Profile: Design Installation Group provides a complete package of mechanical and electrical building services to suit the needs of clients. We are an ISO 9001:2000 certified company. Our mechanical services provide solution for heating, ventilation, air conditioning, incoming services distribution, hot and cold water distribution, sanitary fittings, and waste systems. Our electrical services include electrical supplies, switchgear and distribution systems, lighting installations, control engineering, and fire & burglar alarms. We specialize in manufacturing and fitting sheet metal ductwork systems to serve HVAC applications, dust, fume extraction, and kitchen ventilation.