• Low NOx Emissions as low as 9, 12 or 30 PPM
• Low Maintenance Costs
• 15 Year Warranties

The Johnston 3-pass boiler has large steam and water storage areas, high efficiencies and the ability to meet wide load demands. The 3-pass design can be manufactured up to a 2500 HP steam boiler. The 3-pass maximizes heat transfer while minimizing the use of refractory - no expensive door repairs.

Each boiler is fully factory fire tested over the complete operating range. The boilers are built in accordance with the latest ASME code requirements, National Electric Code and other required local, state and insurance requirements. Dependent on the design and operating conditions, efficiencies can reach up to 90%. Here at Johnston, we strive to supply the right products for your special applications.