Heating, Ventilation and Air Conditioning Techniques (HVAC) Posted on July 14, 2011 at 5:00 pm. HVAC technicians are required in many parts of our everyday lives. From installing the latest high-efficiency furnace in your home to keeping you cool in your office; a Durham College (DC) HVAC technician has got your covered. Learn hands-on in DC’s shops from faculty with years of industry experience and expertise. As a graduate, you will have the theoretical and practical skills to challenge entry-level certification in the industry.