Designed for safe trouble-free operation over a long service life, Royall™ Pressurized Boiler Systems offer unique advantages to the homeowner seeking auxiliary or primary coal or wood burning system. Royall™ boilers are built to the exacting standards of the American Society of Mechanical Engineers (ASME). Every aspect of the boiler design, material, and construction is inspected by the Hartford Boiler Inspection & Insurance Company. Boilers are also inspected on-site by the National Board of Boiler and Pressure Vessel Inspectors and are continually checked by our quality control team.