Thornton Heating Service, Inc. opened it's doors in 1959 to serve the needs of Chicago's North Shore by installing and repairing hot water & steam heating systems. Over the years we have grown to become a trusted HVAC service company offering a wide variety of name brand products and highly skilled services for heating, cooling, comfort and safety across the North and Northwest Suburban areas. Under continuous ownership of the Starck family since 1974, we remain focused on the customer by providing them with superior design, installation and service capabilities. Our goal of 100% customer satisfaction drives every decision and action we take in order to meet the needs of our customer. Our "customer first" attitude is evident in everything we do... from designing the most comfortable, efficient and healthy systems, to being scrupulously careful and thorough during every installation and providing responsive, expert follow-through on all service and repairs.