The Ohio Special is designed, manufactured, and packaged by Williams & Davis Boilers specifically for operation in the state of Ohio, under the rules and regulations for unattended units. Our unique design serves your steam needs and reduces unnecessary labor costs. The Ohio Special is a traditional 3-pass, water-back horizontal firetube boiler that offers high efficiency, flexibility, reliability, safety and ease of operation. Series 3000W provides high flue gas velocities and low stack temperatures to maximize its performance.