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Green’s Boilers, Economisers and Maintenance Services for the Marine Industry

Greens Power

Green’s specialises in the design, manufacture, installation and support of fired and exhaust gas boilers and economisers for the marine industry.

The company supplies steam-generating and heat recovery equipment for new builds, as well as performs retrofits for existing installations.

Its patented production machines and class-approved facilities ensure high-quality products that meet the requirements of international marine classification societies.

Repair services for ship boilers

From its head office in Wakefield, UK, Green’s mobilises its skilled and experienced service teams to carry out boiler repairs, re-tubes, refractory work, pipework, coded welding, boiler statutory inspections and surveys worldwide.

The company’s service and commissioning engineers resolve problems with burners and their controls, as well as perform planned maintenance.

Green’s’ experience in the marine boiler industry means it can design, supply and install a number of upgrades and retrofits to ensure boilers continue to operate efficiently.

The company has been creating steam boilers and heat recovery equipment since Edward Green first patented the economiser in 1845.

Marine boiler and burner spares

Green’s supplies spare parts for the majority of marine boilers, burners and ancillary equipment.

The company stocks commonly used components available for immediate dispatch, including burner flame scanners, electrodes to finned tubes, and safety valves.

Its experienced spares technicians have an excellent relationship with a number of approved suppliers, allowing the company to quickly source and deliver parts worldwide.

Heat recovery from auxiliary engines

Green’s has successfully launched the Spanner HBR composite boiler for waste heat recovery in new builds.

Waste heat recovery can reduce or eliminate the firing of auxiliary boilers while vessels are manoeuvring, at port or occupying certain operating regimes at sea.

For existing sea-going vessels, Green’s can retrofit a fully engineered, compact Spanner exhaust gas economiser (EGE), which is suitable for up to three auxiliary engines.

The EGEs provide large fuel savings with a payback of 12-18 months. The units are easy to maintain and cost less to run compared to auxiliary boilers.

Fired boilers for ships

The ‘Spanner’ smoke tube oil-fired boilers by Green’s are designed to enhance efficiency, reliability, compactness and easy access for maintenance and cleaning.

The boilers can be designed to meet steam raising or hot water requirements, and offer steam outputs from 500kg/h to 16,000kg/h at pressures up to 18bar.

Spanner boilers can be fitted with pressure jet or rotary cup burners, depending on the steam output required.

Water tube boilers for maritime vessels

The company’s TD, D and ESD-type water tube boilers are suitable for cruise ships, tankers and offshore applications.

For cruise ships, Green’s provides large steam drums for multiple exhaust gas economisers.

The steam output for the TD type is between 6,000kg/hr and 50,000kg/hr, with pressures up to 21bar. The D / ESD type provides steam outputs ranging from 10,000kg/hr to 220,000kg/hr, pressures up to 60bar, and temperatures of up to 515°C.

Higher outputs and pressures are available.

Exhaust gas boilers for heat transfer optimisation

Diesecon exhaust gas boilers (water tube) by Green’s can be found in operation on numerous vessels, including P&O Cruise’s Britannia.

The Diesecon boilers use the company’s H-Fin tubes to maximise heat transfer and problem-free operation, and can be installed on both main and auxiliary engines.

Smoke tube exhaust gas boilers

The company’s range of vertical or horizontal exhaust gas boilers provide an alternative to water tube designs.

The smoke tube exhaust gas boiler offers its own water and steam space, a feed pump and natural circulation. It does not require an additional pump and can work independently of the ship’s auxiliary boiler, a useful feature during system maintenance at sea.

The same units can also incorporate multi-engine applications within the same shell (composite boilers). Alternatively, the boiler can be provided fully flooded and work in conjunction with the oil-fired boiler, using circulating pumps in a conventional manner.

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Press Release

Green’s and Thornhill Collaborate on Industrial Heat Exchanger Solutions

One of the UK’s largest providers of design, manufacture and support services for heat exchanger and boiler equipment for the marine sector has been created through a collaboration between Green’s and Thornhill.

White Papers

High-Performance Boiler Tube Bending Machine

Green’s latest CNC multi-axis, mandrel and boost bending machine allows the company to deliver a new range of tube heat exchangers.


Raines Business Centre

Raines House

Denby Dale Road




+44 1924 203970 +44 1924 387320

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Press Release

26 February 2019

One of the UK’s largest providers of design, manufacture and support services for heat exchanger and boiler equipment for the marine sector has been created through a collaboration between Green’s and Thornhill.

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17 January 2019

Green’s support for the European marine market has been strengthened with the appointment of Peter Lund Mogensen as technical sales manager - marine.

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9 January 2019

Green’s marine boiler repairs team has been working on a wide variety of projects recently with many more contracts upcoming.

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8 November 2018

Green’s has significantly increased the support it has provided to marine operators around the world over the past 12 months.

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26 July 2018

Green’s is to significantly improve the energy-saving and cost-cutting benefits of its marine steam systems with its investment in a unique combination of modelling tools, people and track record.

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29 June 2018

Green’s has recently re-tubed a Sunrod oil-fired boiler on board Irish Ferries’ MV Oscar Wilde ship.

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18 December 2017

The ongoing long-term partnership between Green’s and Damen Shiprepair & Conversion (DSC) saw a team of 30 aftermarket engineers carry out comprehensive inspection, service and repairs to the MHI Steam Boilers onboard EXMAR’s LNG carrier Excalibur.

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10 October 2017

Waste heat recovery specialist Green's has doubled its turnover in the past year with over half of its business now coming from overseas.

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28 September 2017

Chris Wright has been promoted to production director at waste heat recovery specialist Green's.

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5 May 2017

Waste heat recovery systems specialist Green's has announced record sales figures for the past 12 months with turnover up 27% to £9.2m.

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31 March 2017

Established in 1966, John Samonas & Sons manages a global fleet of dry bulk carriers, which transport a range of commodities including iron ore, coal and agricultural products.

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15 November 2016

Green's, the waste heat recovery specialist, has launched a boiler inspection service available to marine organisations to identify current and potential problems with boilers and ancillary equipment so that they can be addressed before they become overly costly or result in avoidable outages.

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3 November 2016

Mike Cotton has joined economiser and waste heat recovery specialist Green's to develop the company's marine repairs operation which supports customers around the world.

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18 October 2016

A recent survey of marine purchasers by Green's, the specialists in economisers and waste heat recovery systems, found that delivery reliability, price and good supplier relationships are the most important issues that influence maritime purchasers' buying decisions.

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10 October 2016

Economiser and waste heat recovery systems specialist Green's has achieved American Society of Mechanical Engineers (ASME) certification for the design, fabrication, assembly, and inspection of boiler and pressure vessel components.

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9 September 2016

Greens Power has rebranded as Green's. This includes a new logo with a more modern look and feel while retaining a link to the company's heritage and origins. Based in Wakefield, West Yorkshire, with an extensive network of international agents, Green's was established in 1821 and specialises in the design, specification and supply of economisers and waste heat recovery systems to the marine industry.

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18 August 2016

Until quite recently waste heat recovery from auxiliary engines has not been considered. For new builds, Greens has successfully launched the Spanner HBR composite boiler.

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18 August 2016

Greens Power Limited (GPL) of Wakefield, UK, have been working in close partnership with Damen Shiprepair Brest, supplying our services to carry out steam plant and associated equipment overhauls and presentation for class surveys.

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19 May 2016

Greens Power Limited of Wakefield, UK, has been working in close partnership with Kuwait Oil Tanker Company (KOTC) by supplying and installing replacement exhaust gas boiler (EGB) units to the company's vessels.

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Regional Offices


Raines Business Centre

Raines House

Denby Dale Road




+44 1924 203970 +44 1924 387320

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