Gas Gas Heater

Howden supplied some of the world’s first FGD systems in 1934, and since then we have become a leading supplier of gas gas heaters.

The Howden VN design concept is ideally suited to the FGD Gas Gas Heater application. Judicious selection of materials, together with advanced design features result in a heat exchanger with exceptional resistance to the cool, moist acidic conditions of FGD plant, where fouling and corrosion are a constant challenge.

Gas gas heaters can be custom designed and optimised to suit arrangement and client preference. If the GGH is being mounted directly on top of the FGD Absorber, construction of the GGH at ground level and a single lift can reduce costs. We are also able to install a tail end SCR gas preheater if this is required due to the specific set up of you power station - you can read more about this in our brochure.

Gas Gas Heater FGD

Why choose Howden Gas Gas Heaters?

Our experience

The first company to form a joint venture with Fredrik Ljungström, we have been designing and improving rotary heat exchanger technology ever since.

Research and development

Continual research, development and analysis of both new and aftermarket heaters to optimise product performance and reliability.

Reputation for quality

We are accredited to ISO 9001, ISO 14001 and OHSAS 18001 and are regularly audited by major customers and internationally recognised assessment organisations.

Global Presence, Local Service

In our experience, there is no substitute for local support; that’s why we have local teams ready to help.

Modern manufacturing

Our state of the art production facilities are staffed by experienced engineers and fully qualified operators.

Element design

We have a wide range of profiles available, enabling us to offer the right balance of thermodynamic performance, pressure drop and ease of cleaning for any situation.

Gas Gas Heater documents

Click the button below to read our Gas Gas Heater brochure.


Case Studies


Almeria case study

The introduction of Howden’s VN seal system to the air preheaters brought an immediate drop in leakage level from 26% to 5%.

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Sanguesa case study

At Howden, we have developed a range of element profiles, materials and coatings designed to offer optimum longevity and cleanability in every situation.

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Itabo I case study

Replacement of primary plate heaters with Howden custom designed rotary air preheaters, greatly improving thermal performance.

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Springerville case study

When Tucson Electric Power (TEP) Springerville Station was experiencing major air leakage issues, they called on Howden to rectify the situation.

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Retrofits and Solutions


The leading manufacturer of heating elements irrespective of the original manufacturer.

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Enhancements and Upgrades

It’s our duty to offer only the very highest standards of service whatever their needs, from initial installation of plant and equipment through routine maintenance to subsequent refurbishment and enhancements.

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Technology and Experience

Over the many years of our ongoing heater applications experience, Howden have investigated and developed important innovative solutions including leakage sealing systems, cleaning systems and intelligent monitoring.

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If you would like to submit an enquiry please get in touch.

Your local Howden contact

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