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 basis: a revolutionary product design
Unlike the familiar vacuum insulation system with vacuum panels inside foam elements, the vacuum perlite technology in BluRoX appliances consists of a complete, stable 3D vacuum element.
The Cradle to Cradle Certified® Certification
Cradle to Cradle Certified® is a prestigious certification standard for products designed for the circular economy. It evaluates products in five areas: material health, material reutilisation, renewable energy, water stewardship, and social fairness. Products are rated for their commitment to sustainability and continuous improvement.
“The BluRoX technology took 10 years to develop.”
Steffen Nagel
Liebherr | Management Board,
Managing Dir. Sales & Marketing
- Outer shell material
- High-barrier foil
- Evacuated perlite
- Interior lining
The outer casing is made of galvanized 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 galvanized 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.
About EcoVadis
We use EcoVadis to quantify our progress in the areas of corporate responsibility and sustainability. Our commitment to a holistic corporate strategy has now been rewarded: The EcoVadis gold medal and our position in the top 3% of all the award-winning companies makes it clear that we are facing up to ecological, social and ethical challenges.
Efficiency of vacuum insulation over time
Our refrigeration appliances should work energy-efficient as long as possible. Therefore we use only durable vacuum insulation panels which age very slowly. For example: Our patented BluRoX insulation technology or vacuum insulation panels made of silica.
*The thermal conductivity of the evacuated perlite in BluRoX is higher than that of other vacuum panels. However, since the entire device is constructed solely from vacuum insulation, the overall insulating effect of the device is better.
The thermal conductivity values were determined through long-term measurement series with various samples in Liebherr's laboratories.
“We had to change the whole product.”
Jochen Hiemeyer
Liebherr | Teamleader Vacuum Technology
Do you have any questions or would you like some advice?
Are you looking for a new fridge or freezer? Just tell us what is important to you and we will find the right model to suit your needs. Do you already have one of our fridges or freezers and would like some advice on use and handling? Get in touch with us. We will be happy to assist you.
You can reach us by telephone from Monday to Friday between 8.00 a.m. and 7.00 p.m. On Saturdays, Sundays and public holidays, we are available from 9.00 a.m. to 2.00 p.m.
Service hotline
Domestic Appliances
Seller: +358 93 157 9150
Service: +358 3 233 3200
Commercial appliances
Seller: +358 10 201 9200
Service: +358 3 553 8681
Contact form
Our service partner
Innovative BluRoX technology from Liebherr
benefits both people and the environment
Maximum energy efficiency
More volume
Recyclable product design
Easy to repair
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
Freezer door with BluRoX technology
A powerful yet sustainable cold insulation? Liebherr has it: The groundbreaking BluRoX 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.
NoFrost
When you open your freezer, you want to see frozen food – and certainly not ice and frost. NoFrost protects the freezer compartment from unwanted icing, which consumes a lot of energy and can be expensive. NoFrost means no more tedious and time-consuming defrosting of the freezer compartment, more time for other things – and saving money.
Integrated SmartDeviceBox
Your Liebherr may well be standing in the kitchen – but if you want, it can also be connected to the Internet at any time. The integrated SmartDeviceBox opens the door to all the Smart Home benefits. Simply plug it in, switch it on and connect your Liebherr to the network via Wi-Fi.
Touch & Swipe display
Control of your Liebherr at your fingertips: thanks to the Touch & Swipe display, you can operate your refrigerator intuitively and with ease. Simply select functions such as SuperCool on the colour display by tapping and swiping. The temperature is controlled just as easily. And, what if you are not actively using the display? Well, it then shows you the actual temperature.
EasyTwist Ice
Whether it's a summer day or a party: Thanks to EasyTwist Ice, you can prepare a supply of ice cubes quickly and easily – without the need for a fixed water connection. Simply fill the tank with water, let it freeze and then release the finished ice cubes with a simple twist – and you're ready to serve cool drinks. The EasyTwist Ice is easy to clean and ensures hygienic ice cube production at all times.
EasyOpen
Done this before? After putting all the shopping in the freezer you remember an item of food you have forgotten – and have to give the door a good pull to open it again. With your Liebherr, you don't need to do this. EasyOpen means the door can be opened multiple times one after another, conveniently and easily.
SuperSilent
Shhh – listen carefully. Your Liebherr is so quiet that you have to strain your ears to hear it. How is this achieved? All refrigeration components such as compressors, valves, fans and evaporators are optimised and perfectly adapted to one another. This means you only hear what you want to hear in your kitchen.
LED freezer compartment lighting
When you open the drawers in your Liebherr freezer, not only are you welcomed by the sight of your food, but also by the attractive lighting. This is provided by powerful, long-life, environmentally-friendly LEDs. The lighting makes it even easier to see all of the contents and is also a unique design element.
SpaceBox
Accommodate the “big stuff” in your Liebherr: An XL turkey or a multi-layered ice cream cake simply needs more space. Your Liebherr has the SpaceBox for exactly that purpose: At a generous height of 250 mm, it offers lots of extra space, even for large frozen goods. Helpful for you when storing food flexibly.
FrostProtect
Not all freezers are fitted in heated rooms. Some are located in cold garages or sheds. It’s good then that your Liebherr is ideally set up for such a cool environment because all components are designed to operate in ambient temperatures as low as -15 °C.
SuperFrost
Want to freeze your fresh food in a way that preserves vitamins? Simply activate SuperFrost – and the freezer compartment will increase its cooling capacity. In this way, the temperature remains constant when you place in unfrozen food. SuperFrost is also energy-saving: if you don't switch off the function manually, it automatically deactivates itself after 65 hours.
VarioSpace
Looking for somewhere to safely store a multi-tiered ice cream cake until the summer party? No problem for your Liebherr freezer: it knows that sometimes you just need more space. Thanks to VarioSpace, you can simply remove individual freezer drawers – and voilà: here’s your extra-high storage space!
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.
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.
CO2 emissions (2022)
| Scope 1: | |
| Direct greenhouse gas emissions generated locally by the activities that an organisation owns or controls. | 1,428t CO2 eq. |
| Scope 2 | |
| Indirect greenhouse gas emissions resulting from purchased energy. | 0t CO2 eq. |
Water consumption (2022)
| Total annual withdrawal (2022) | 12,319 m³ | Third-party fresh water. |
| Total annual discharge (2022) | 11,683 m³ | Discharge to third-party (without onsite pre-treatment) - only applies to the water use for hygienic purposes (toilets, hand washing) and/or in kitchens. |
| Total annual consumption (2022) | 636 m³ | The water contained in the painting system* is cleaned, evaporated and put back into circulation. Fresh water needs to be added from time to time to compensate the evaporated water - the system operates without wastewater. *The painting system is not part of the production process of all BlueRoX appliances -and will be phased out for all production processes at the complete production facility. |
| Water quantity by use cycle stage of BluRoX appliances | No water consumption in manufacturing-processes of BluRoX appliances. No water consumption in use stage. | |
| Physical risk Ochsenhausen: (Baseline water stress) | medium-high (20-40%) | Reference: AQUEDUCT Water Risk Atlas |
Materials
Materials used in refrigerators and freezers come into contact with food and must therefore meet specific criteria. At Liebherr, we ensure compliance with food safety standards.
We are committed to continuously increasing the proportion of recycled materials in the future.
Where do we stand?
Currently, we are unable to procure sufficient quantities of recycled materials for plastics and glass that meet these requirements. In the case of steel, the recycled content could not be reliably demonstrated by our suppliers.
About EcoVadis
We use EcoVadis to make our progress in the area of corporate responsibility and sustainability measurable. Our focus on a holistic corporate strategy has now been rewarded: being awarded the EcoVadis gold medal and being ranked in the top 3% of all award-winning companies clearly shows that we are tackling environmental, social and ethical challenges.
Freshness technologies
Energy efficiency
Excellent design
German engineering
| Scope 1: | |
| Direct greenhouse gas emissions generated locally by the activities that an organisation owns or controls. | 1,428t CO2 eq. |
Scope 2: | |
| Indirect greenhouse gas emissions resulting from purchased energy. | 0t CO2 eq. |
| Total annual withdrawal (2022) | 12,319 m³ | Third-party fresh water. |
| Total annual discharge (2022) | 11,683 m³ | Discharge to third-party (without onsite pre-treatment) - only applies to the water use for hygienic purposes (toilets, hand washing) and/or in kitchens. |
| Total annual consumption (2022) | 636 m³ | The water contained in the painting system* is cleaned, evaporated and put back into circulation. Fresh water needs to be added from time to time to compensate the evaporated water - the system operates without wastewater. *The painting system is not part of the production process of all BlueRoX appliances -and will be phased out for all production processes at the complete production facility. |
| Water quantity by use cycle stage of BluRoX appliances | No water consumption in manufacturing-processes of BluRoX appliances. No water consumption in use stage. | |
| Physical risk Ochsenhausen: (Baseline water stress) | medium-high (20-40%) | Reference: AQUEDUCT Water Risk Atlas |
Materials
Materials used in refrigerators and freezers come into contact with food and must therefore meet specific criteria. At Liebherr, we ensure compliance with food safety standards.
We are committed to continuously increasing the proportion of recycled materials in the future.
Where do we stand?
Currently, we are unable to procure sufficient quantities of recycled materials for plastics and glass that meet these requirements. In the case of steel, the recycled content could not be reliably demonstrated by our suppliers.
Circular by design
More volume
Easier repairability
