Mid-State Air Conditioning, Heating & Plumbing in Fairview, TN offers top Heating and Cooling Services in the Fairview area. Mid-State Air Conditioning, Heating & Plumbing in Fairview has been providing expert service to homeowners throughout the Nashville region since 1970. Ever since, they have developed a reputation for excellence in every project they take on – from installing a new heating or air conditioning system to ongoing maintenance for your HVAC system.