Ljungstrom® Gas-Gas Heaters (GGH)

LJUNGSTRÖM is known around the world as the leading provider of premium GGH units, products, components and upgrades.

Ljungström® Gas-Gas Heaters are unrivaled for their cleanability, which improves operational flexibility and optimizes the heat transfer process. High-efficiency sealing systems reduce leakage, and our premium quality enamel minimizes equipment corrosion.

Efficient Heat Recovery

Expertly designed to provide efficient flue gas heat recovery, ahead of flue gas desulphurization (FGD) or tail end selective catalytic reactors (SCR).

Seamless Operation

Our genuine gas-gas heaters have an unrivaled track record for the highest availability and trouble-free operation.

Long Lasting

Our unique GGHs are celebrated for their quality, reliability and operating experience of more than 30,000,000 hours


The first choice for coal and oil fired plants around the world


Making the SCR process more efficient, reliable and clean


LJUNGSTRÖM has been paving the way for GGH technology from the very beginning. Back in the 1970s, our team of engineers developed our cutting-edge air preheater into a powerful gas-gas heater platform. Ever since the Ljungstrom® Gas-Gas Heater systems have been operating in coal and oil-fired power plants and industrial applications around the world, and we have maintained a reputation as the world’s leading GGH experts.

Our premium GGH offer a long-lasting operation and unmatched experience. Our expertise allows us to provide a number of proven product configurations tailored for each installation. We only ever choose materials and components of the highest quality to ensure that we are delivering every client the best possible solution.


A superior system offering optimal performance

Proven product technology backed by global experience

Most cleanable GGH solution which improves your operation's flexibility

Low leakage operation with high efficiency sealing systems

Advanced heating element profiles

Highest quality enamel using the best available processes

Addressing environmental concerns

Minimized equipment and ductwork corrosion

Improved plume dispersion and reduced plume opacity

Reduced ground level concentrations and acid fallout problems

Eliminated or reduced need for lining downstream ducts and stack

The best choice over all other reheat and rotary systems

Industry preferred technology, including all major leading FGD and SCR system suppliers

Proven design for all FGD and SCR applications

Corrosion-resistant thanks to the highest quality enamel

High reliability and availability

Compact design with less space requirements

Low-pressure drop for minimal impact on your plant's heat rate


Our position as industry leaders is a direct result of our commitment to customer satisfaction, as well as our ongoing dedication to developing advanced technology that meets our customers’ needs

Enhancements & Upgrades

We can refurbish existing equipment, replace components, or upgrade your entire system to restore the thermal efficiency and leakage control of your operation to better than new.

Upgrade to the Ljungstrom® Air Preheater and the Ljungstrom® Gas-gas Heater to boost the performance and efficiency of your operation.

Enhance your processes with our industry preferred auxiliary systems and state-of-the-art technologies.

We offer multiple configurations, to suit your space and setup.

Hassle-free replacement of your full air preheater unit, with a unique drop-in design that attaches directly to existing support foundations.

Certified Ljungstrom® parts and components

Replacement of heating elements

Replacement of rotor components that have become worn over time

Auxiliary system parts (drive, bearings, etc)


Our technical service specialists and engineers, along with our authorized partners, will carry out world-class inspections of every element and component within your operation and provide a detailed report. Inspections can include:

Heating element basket review and recommendations

Rotating component life assessment

Condition assessment of sealing system and drive system

Shaft position and bearing inspection

Cleaning system efficiency evaluation

Assessment of operating parameter and performance

Remote Visual Inspection – Utilizing the latest aerial robotic technologies

Efficient Sealing System

Offering unique benefits during both hot and cold commissioning

Multiple ways to reduce leakage

Load-following leakage control systems

Customized Maintenance Plan

We’ll work closely with you to create a tailored maintenance plan, including recommendations for work to be carried out during planned outages. We will carry out an initial condition assessment and provide a detailed report, with recommendations that are tailored to you and your operation. This includes labour and resource planning, repairs, upgrades, replacement parts and installation services.

Emergency Services

We have a responsive team of expert technical service specialists and engineers who are the best in their fields. They are available to diagnose and repair any problems on-site, every day of the year, to help you optimize the operation and reliability of your equipment.

If you are interested in our technology and services, or would like to get in touch for any reason, we would love to hear from you.