The Dunkirk D250 Commercial Gas Boiler is a reliable, mid-efficiency heating solution, ideal for schools, churches, offices, and apartment buildings. Available in a range from 300 to 1,500 MBH, this steam boiler features a durable cast iron heat exchanger and an atmospheric combustion system. Factory pre-assembled bases and Plug-N-Play harnesses simplify installation, while an external control panel and color-coded wiring reduce installation time and errors. The D249 is designed for vertical venting and easy servicing, ensuring dependable performance in demanding commercial environments.