Businesses across South Carolina rely on Advanced Technology for professional rooftop HVAC unit installation, repair, and maintenance. Based in Lexington, SC, our licensed technicians service all makes and models of rooftop package units (RTUs), keeping commercial facilities comfortable and efficient. With 24/7 emergency service, free estimates, and over 20 years of experience, we proudly serve offices, restaurants, warehouses, and retail properties in Lexington, Columbia, Charleston, and Greenville.