Since the mid-1970s, Tonna Mechanical has been assisting customers with all of their home and business indoor comfort needs. Proudly providing heating, air conditioning, ventilation, refrigeration, water conditioning and plumbing services, the team at Tonna Mechanical makes it their mission to ensure that Minnesota homes and businesses are always comfortable. The company serves most of Southeastern Minnesota, including Rochester, Mankato and the Minneapolis/St. Paul metropolitan areas.