Our pressurized systems offer the greatest versatility in an outdoor heating system. Royall pressurized systems are the unit of choice for homes, farms and business establishments demanding the best in wood or coal fired systems. Our welding personnel are required to pass the rigid ASME testing procedure to become certified. All Royall boilers are built to the exacting standards of the American Society of Mechanical Engineers (ASME). Every aspect of boiler design, material and construction is inspected by the Hartford Boiler Inspection & Insurance Company. The 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.

Interior of a Royall 6490 Outdoor Boiler.  Notice the stay bolts protruding the interrior of the boiler.  The stay bolts are introduced to the boiler to keep the inner round and the outer round from expanding and contracting to maintain the life expectancy of the Royall boiler.  Also pictured are fire brick and the shaker grate system that Royall has provided for over 40 years. 

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