Hot Water Boilers

Ici Caldaie have a proud 60 year history and the largest production plant for steel and industrial boilers in Europe, producing around 12,000 hot water boilers and 1000 industrial boilers per year. They are also a leader in the journey towards new forms of energy generation and cleaner technologies, with many collaborative projects working simultaneously on both sustainability and green energy, mostly linked to hydrogen as a fuel source.

Ici Caldaie have a complete range of floor standing LPHW heating boilers with an operating temperature between 60° and 100°C. Fabricated from carbon steel and for use with forced draft (pressure jet) burners, these boilers are designed and manufactured to meet current European directives for high efficiency and low emissions.

These boilers feature:

  • Extremely High Efficiency – thanks to the large exchange surfaces allowing top efficiency values under all operating conditions.

  • Maximum Operating Flexibility – thanks to the very high water content and the very high thermal inertia, making them suitable for even the most difficult operating conditions.

  • High Reliability in Continuous Operation – with construction features such to make them particularly suitable to high working loads and long working periods.

  • Maximum Security – designed in accordance with the strictest international safety regulations.

  • Easy, Fast and Safe Installation – just connect the system to the electric & hydraulic lines.


The REX F & REX ranges of three pass reverse flame horizontal fire tube boilers are suitable for use on gaseous and liquid fuels, and have a capacity range from 70kW to 6000kW.
The GREENOx range are a special high efficiency three pass wet back horizontal fire tube design with low NOx emissions in compliance with the most stringent standards
The TNX and TNOX ranges of genuine three pass horizontal fire tube boilers are suitable for use on gaseous and liquid fuels, and designed for large (>2.5MW) heating systems with an operating temperature between 60° and 100°C

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