Integrated Systems of the Triangle, LLC (IST) was formed by our President, Pat Marshall after a 19 year banking career led Pat to a new career. He utilized his years of customer loyalty and trustworthiness to establish a multi trade construction company specializing in heating and cooling and electrical installation, service and design in 2010. Our Electrical and HVAC Operations Managers are backed by a combined 59 years of experience and are highly qualified and experienced in providing heating and cooling and electrical services for your home or business. With two mechanical trades in one company, we have you covered no matter what your needs are. Count on our technicians for prompt and professional service and experience for yourself why we are a local favorite.