Johnston Boiler Company pioneered the first water backed boiler over 100 years ago, and the first packaged water backed boiler over 65 years ago. Johnston features a complete packaged boiler that needs just the essential utility and discharge hook-ups before supplying your steam or hot water needs. The complete package is thoroughly factory fire tested at all applicable loads and fuels prior to painting and shipment.
Depending on design and operating pressure, efficiencies reach 90% – the highest in the industry without turbulators or an economizer. Minimum use of refractory and the full water back design reduces maintenance while at the same time enhances pressure vessel longevity.
From front to back and top to bottom, every Johnston boiler comes with an unprecedented, industry-leading 15 year warranty, covering the tube sheets, furnace, rear combustion chamber, flue doors, materials, and labor.