BluRoX: Innovative vacuum perlite insulation
The future is circular
Our vacuum perlite technology is an innovation that will transform refrigeration and freezing. Introducing BluRoX. Instead of conventional polyurethane (PU) foam, this innovative technology uses a more effective form of cold insulation: a vacuum. Finely ground lava stone, known as perlite, stabilises the vacuumed components.
“The BluRoX technology took 10 years to develop.”
Steffen Nagel
Liebherr | Management Board,
Managing Dir. Sales & Marketing
The outer casing is made of galvanised sheet metal, featuring a white lacquered exterior and a coated inner layer. These materials provide a sturdy structure for the appliance, support the white finish, and serve as the contact point for the door seal magnet.
The outer casing is made of galvanised sheet metal, featuring a white lacquered exterior and a coated inner layer. These materials provide a sturdy structure for the appliance, support the white finish, and serve as the contact point for the door seal magnet.
10 years in the making – Meet some of the people behind the revolutionary freezer in our FNXa 522i film.
“We had to change the whole product.”
Jochen Hiemeyer
Liebherr | Teamleader Vacuum Technology
Highest energy efficiency
Easier repairability
More volume
Circular by design
The FNXa 522i - The first Cradle to Cradle Certified® freezer
The Liebherr FNXa 522i freezer is coming and will be available 2026. Born from volcanic rock and over a decade of innovation, is unique in the market. It unites all the benefits of our BluRoX technology, ensuring unmatched energy efficiency (Class A) and up to 30% more storage. The base cooling module cassette ensures easy maintenance. Its circular design allows each component to be reused, earning the Cradle to Cradle Certified® Bronze certification. Our freezer is built for the eco-conscious consumer and steps towards a future that is not linear – but circular.
FNb 505i – our first freezer with BluRoX
BluRoX is already available – in the door of our FNb 505i freezer. The groundbreaking vacuum perlite technology offers an unprecedented and extremely efficient cold insulation. Thus, freezers can achieve top values in energy efficiency. In addition, the materials in the door can be sorted and reused at the end of their service life.
Exterior dimensions: height/width/depth - 165.5 / 59.7 / 65.5 cm
165.5 / 59.7 / 65.5 cm
Total volume - 238 l
238 l
Made in Germany
Our superior products offer premium quality, cutting edge design, and innovative features that best fit your lifestyle. The use of high quality materials, perfectly detailed finishes, and elite cooling components are combined with the latest production processes, resulting in an outstanding cooling product.