The Master Group/Le Groupe Master - EFI Concepts, a sales agency serving the heating, ventilating and air conditioning (HVAC) industry, offers quality equipment from many proven manufacturers. The markets served include Industrial, Commercial and High Performance Buildings. Our key personnel have long standing HVAC Industry experience and with most of our sales personnel being Professional Engineers, EFI Concepts has the capability of not only supplying quality products, but also offering application and installation expertise second to none in the industry.