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We are ICI UK

With over two decades of excellence, ICI UK is one of the largest and most trusted boiler manufacturers in the UK, with international recognition since 2003. As part of the Torishima Group since 2013, ICI UK proudly serves businesses, creating sustainable thermal solutions that power industries and support global sustainability.

Our diverse client base trusts us to adapt and innovate, producing reliable boiler solutions tailored to their unique needs. With a dedicated and expanding team, we’re committed to being a leader in commercial and industrial heating solutions across the UK and beyond.

Join us in shaping the future of sustainable heating, the journey of innovation continues.

Choose your boiler type

Steam Boilers
Hot Water Boilers
Superheated Boilers
Heat Recovery Boilers
Thermal Oil Boilers

Steam Boiler

Discover ICI Caldaie’s advanced range of industrial steam boilers, built for efficiency, performance, and sustainability.
Our steam generators feature smoke tube, three-pass, and flame reversal designs, delivering instantaneous, low, and high-pressure steam.
With steam production capacities from 50 to 32,000 kg/h, all boilers support 72-hour operator exemption (GSS), ensuring maximum autonomy and reliability. Ideal for a range of industries, our innovative solutions prioritize energy efficiency and long-term cost savings.

Hot Water Boilers

Discover ICI Caldaie’s range of industrial hot water boilers, designed to deliver powerful and efficient heating for large-scale industrial applications. Built with smoke tube, three-turn, or flame reversal designs, these boilers feature high water content to ensure optimal thermal efficiency and reliability.
Ideal for district heating networks, hospitals, airports, shopping centers, and accommodation facilities, they provide heating capacities ranging from 2,500 to 20,000 kW.
Our industrial hot water boilers combine energy efficiency, robust construction, and advanced control systems for safe, automated, and cost-effective operation. 

Superheated Water Boilers​

Discover ICI Caldaie’s advanced range of superheated water boilers, designed for high-performance heating and technological systems. Built using smoke tube, three-pass, and flame reversal designs, these boilers operate at temperatures above 110°C to meet the demands of industrial and process heating applications. With power capacities ranging from 200 to 17,000 kW, they offer versatile and efficient thermal solutions.
All models can be equipped with GSS operator exemption systems for up to 72 hours of autonomous operation, ensuring safe, efficient, and uninterrupted heating performance.

Heat Recovery Boilers

Discover our range of waste heat recovery boilers, designed to capture and repurpose heat from flue gases emitted by engines, turbines, furnaces, and other industrial processes. These versatile boilers generate steam (WHB), superheated water (WHS), diathermic oil (WHO), or hot water (WHC), maximizing energy efficiency and reducing environmental impact.
Each unit is fully equipped with advanced regulation and safety accessories, ensuring safe and automatic operation. Our waste heat recovery solutions deliver energy savings, sustainability, and enhanced operational efficiency for a wide range of industrial applications.

Thermal Oil Boilers

Explore ICI Caldaie’s range of thermal oil boilers, engineered for safe, efficient, and high-performance heating with diathermic oil.
Built with a three-smoke-pass design, these boilers ensure low thermal loads and high oil speeds to prevent oil cracking, promoting long-term reliability. Operating at a design pressure of 10 bar, they offer power outputs from 100 to 9,000 kW, making them ideal for various industrial applications. Constructed to meet the highest industry standards, ICI Caldaie’s thermal oil boilers deliver superior performance, energy efficiency, and compliance with strict regulatory requirements.

Industrial Steam Boilers

GX

Steam: 1700 ÷ 32000 kg/h
Nominal power: 1163 ÷ 17442 kW
Design pressure: 12 or 15 bar
Efficiency: 90,0 %

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Industrial Steam Boilers

Ecovapor

Steam: 1000 ÷ 3000 kg/h
Nominal power: 681 ÷ 2044 kW
Design pressure: 12 bar
Efficiency: > 95,0 %

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Industrial Steam Boilers

Sixen N

Steam production: 350 to 5000 kg/h
Nominal power: 238 ÷ 3407 kW
Design pressure: 12 or 15 bar
Efficiency: > 90.0%

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Industrial Steam Boilers

Trevapor

Steam: 1200 ÷ 6500 kg/h
Nominal power: 818 ÷ 4770 kW
Design pressure: 12 bar
Efficiency: 90,5 %

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Industrial Steam Boilers

BNX

Steam: 100 ÷ 3000 kg/h
Nominal power: 69,8 ÷ 2035 kW
Design pressure: 0,98 o 0,5 bar
Efficiency: > 91,0 %

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Industrial Steam Boilers

Flash

Steam: 20,3 ÷ 244,2 kg/h
Nominal power: 15 ÷ 180 kW
Design pressure: 4,5 bar

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Industrial Steam Boilers

FX N

Steam: 50 ÷ 300 kg/h
Nominal power: 31,7 ÷ 209,2 kW
Design pressure: 5 bar
Efficiency: > 91,0 %

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Industrial Hot Water Boilers

TNOX

Nominal power: 2500 ÷ 25000 kW
Design pressure: 6 bar
Efficiency: > 92,0 %

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Industrial Hot Water Boilers

TNX

Nominal power: 3000 ÷ 20000 kW
Design pressure: 6 bar
Efficiency: > 92,0 %

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Industrial Hot Water Boilers

GREENOx.e

Nominal power: 420 ÷ 3000 kW
Design pressure: 5 bar
Efficiency: > 95,0 %

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Industrial Hot Water Boilers

REX

Nominal power: 3000 ÷ 20000 kW
Design pressure: 6 bar
Efficiency: > 92,0 %

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Superheated Water Boilers

ASGX EN

Nominal power: 3000 ÷ 17000 kW
Design pressure: 12 bar
Efficiency: > 90.0%

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Superheated Water Boilers

ASX

Nominal power: 233 ÷ 3488 kW
Design pressure: 5 or 12 bar
Efficiency: > 90.0%

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Heat Recovery Boilers

WH

Nominal power: 100 ÷ 20000 kW
Design pressure: from 1 to 25 bar

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Thermal Oil Boilers

OPX

Nominal power: 116 ÷ 9302 kW
Design pressure: 10 bar
Efficiency: > 86,0 %

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Some of our case study

Anglian Water – Whitlingham STW

  • Industrial Steam Boilers
  • Manufacturing industry
  • United Kingdom
  • GX, SIXEN N

Read the case study >

Ministry of Defence Royal Dockyard

  • Industrial Steam Boilers
  • Residential
  • United Kingdom
  • GX

Read the case study >

Withybush Hospital

  • Waste Heat Recovery Boilers
  • Health and reception facilities
  • United Kingdom
  • WH

Read the case study >

British Military Force

  • Superheated Water Boilers
  • Residential
  • United Kingdom
  • ASX

Read the case study >

Discover all UK Case Study

Contact Us

Do you have any questions or requests regarding our technologies?
Write to us using the form below or contact our customer service.

Contact details

Available Monday to Friday, 8:30am – 5pm.

Call us on +44 (0)1249 691410
Write to us at: sales@icicaldaie.co.uk

Contact Address

ICI Caldaie Ltd
5 Berrington Rd,
Leamington Spa CV31 1NB
United Kingdom

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