Thanks to our superior modular designs, and highest efficiency, our field assembled rotary regenerative air preheaters are the preferred choice for larger scale flue gas heat recovery applications.

Long-lasting, superior performance

LJUNGSTRÖM engineers have worked hard to ensure correct heating element configuration, materials, and thickness for optimal thermal and pressure drop performance, resulting in durable and high performing equipment.

Premium quality materials

Our experience with mild steel, low alloy steel, and premium enameled heating element is second to none. With advanced quality control checks and processes, our heating elements and container materials perform to exceptional standards.

Efficient sealing systems

We offer a range of sealing system options that deliver the lowest air-to-gas leakage while still providing the flexibility to operate across a range of loads.


Ljungström® Air Preheaters are accepted as the worldwide standard in regenerative heat exchanger technology. Our state-of-the-art units improve thermal efficiency, reduce air to gas leakage and minimize corrosion, leading to long-term savings. They are available in a range of versatile modular design platforms and configurations to suit every plant and operation. 

Our vast experience and expertise have led to our range of versatile modular design platforms and configurations. This ensures that we can meet the many different requirements of our customers globally.

Maximum Flexibility

Our modular design concept offers a platform with first-class technologies that can be tailored to suit a wide variety of different power plant applications whether they are fired by pulverized coal, oil, gas, or biomass.

Multiple Sizes

We know that thermal power plants are becoming increasingly large, which is why our air preheaters provide maximum flexibility and are available in a wide range of sizes. Accordingly, we’re able to meet the requirements of even the world’s largest plants.


No one knows Ljungström® Air Preheaters as we do. With a reputation as the global leader in the design, manufacturing, installation, and maintenance of APH, LJUNGSTRÖM is proud to be the owner of Ljungström® Air Preheater technology.

Our history dates back to the 1920s when the first efficient air preheater was invented in Sweden by Frederick Ljungström. Today, we own all Ljungström® patents and trademarks across the world. Our group also combines the resources of industry-leading names including SRM, Air Preheater Company, Kraftanlagen, Gadelius, Stein, PBS, and APEL.

Our genuine Ljungström® Air Preheaters are recognized by boiler companies, utilities and manufacturers around the world as the best products of their type. This is why our air preheaters are more widely used than any other type of heat exchanger.

Increased Efficiency. Reduced Costs.

Our air preheaters deliver impressive performance including high thermal efficiency, leakage reduction, and low pressure drop, to enhance your operations and allow significant savings. Our air preheaters deliver impressive performance including high thermal efficiency, leakage reduction and low pressure drop, to enhance your operations and allow you to save significantly.

Superior Manufacturing

Our eight global manufacturing facilities provide a range of equipment and processes and are continually upgraded to meet the changing needs of our customers.

Tried and Tested

We use a range of specialized equipment and procedures to ensure the quality and durability of our preheating products so that we are only ever providing our customers with the very best.

Ongoing Research and Development

We invest heavily in research and development so that we can continually adapt and meet not just the current needs of our industry, but future needs too.

Round-the-clock Support

Our global team of highly experience technical service specialists and engineers are available 365 a year to help maintain the efficient and reliable operation of your Ljungström® Air Preheater.



  • Centre or peripheral support arrangements
  • Sizes to meet all preheat requirements for industrial and utility-sized boilers
  • Bi-sector, tri-sector and quad-sector arrangements



  • Comprehensive options to reduce leakage
  • Load following leakage control systems
  • Delivering unique benefits during hot and cold commissioning



  • Highest efficiency for lowest pressure drop
  • Range of profiles that provide easier cleaning and maintenance during operation
  • Extended life due to lower soot blowing pressures



  • Optimized erection sequence with minimum number of assemblies
  • Alternative welded and pinned rotor options available



  • Robust drive configurations
  • Low maintenance auxiliary systems
  • Substantial, long-lasting and durable equipment