Burnham Holdings, Inc. is a Lancaster-based holding company whose subsidiaries manufacture boilers and related thermal technologies for residential, commercial, and industrial HVAC applications. Its unusual breadth comes from combining established heating brands with vertically integrated operations, including a gray and ductile iron foundry and a sheet-metal plant. The group’s products are manufactured at company-operated facilities across the East, South, and Midwest and serve both interior-comfort needs and industrial processes.