Frequently asked questions

Vacuum glass is no ordinary insulating glass - it is a smart and future-proof solution for sustainable construction. Compared to standard insulation glass, BENG glass offers benefits that directly improve your home as well as help the climate.

• Superior insulation
  With a U-value starting at 0.35 W/m²K, BENG glass is two times better than triple glazing (0.70) and three times better than HR++ glass (1.10). This ensures less heat loss, lower heating costs and a comfortable home.
• No loss of insulation in slope
  Many insulation glasses lose up to 60% of their performance when installed at an angle. BENG glass continues to perform.
• Up to twice the lifespan
  Whereas traditional glass lasts an average of 25 years, BENG glass lasts up to 50 years. Producing it once means less CO₂ and half a century of benefit.
• Strong noise reduction
  From 36 dB to 42 dB, well above HR++ (31 dB) and triple glazing (33 dB). As a result, you live more quietly and peacefully. Ideal for homes or properties on busy roads.
• More comfort all year round
  Cool in summer, warm in winter - without draughts or cold spots.
• No condensation on the inside
  The unique edge seal completely prevents interior condensation.
• Fits into existing window frames
  With only 8.3 mm thickness, BENG glass almost always fits into existing window frames. This makes renovations easier and avoids unnecessary use of materials.
• A true climate hero
  If the entire Netherlands switches to BENG glass, we save up to 4.1 megatons of CO₂ annually - comparable to 170,000 car trips from Amsterdam to Paris.
  The production of BENG glass itself will also save 24,000 tons of CO₂ per year, thanks to production using green energy, 30% less material usage than with triple glazing, up to twice the lifespan and high insulation.
• A smart investment in the future
  A U-value that insulates up to 2x better and that for as much as 50 years. Combine that with an improved energy label and a higher home value and you have your costs back immediately!

Because you don't just buy glass, but a future-proof solution that really saves money and energy. BENG glass has an insulation value from 0.35 W/m²K - that is 2x better than triple glass (0.70) and even 3x better than HR++ glass (1.1). Less heat loss immediately means lower heating costs. It also means a better energy label and thus a higher home value. The effective payback time is often 0 years.

But that's not all. BENG glass lasts up to 50 years, while standard glass needs to be replaced after 25 years on average. Invest once, and you're set for two generations. That means less maintenance, less replacement, and thus lower overall costs.

The environment also benefits: if the entire Netherlands switches to BENG glass, we save as much as 4.1 megatons of CO₂ annually - comparable to 170,000 car trips from Amsterdam to Paris. Less CO₂ emissions and a lower energy bill: that's what we call an investment that pays for itself.

In short: with BENG glass you invest in sustainability, comfort and financial savings. Smart, right?

The price of vacuum glass varies by brand and application. Count on about 285 to 400 euros per square meter (sales advisory price excluding VAT, transportation and installation). More important, however, is what it will save you in total.

After all, with vacuum glass you save on:

• new window frames
• heavy (and expensive) hinges and locks
• your energy bill
• replacement costs (no 20-30 years, but a life span up to approximately 50 years)
• And you benefit from a better energy label.

On top of that, the value of your home increases immediately.

The recommended retail price of BENG glass is 285 euros per square meter, excluding installation, transport and VAT. The final price depends on your situation. If you order many square meters, the price per square meter may be lower. If you choose laminated or hybrid BENG glass and want a price including installation, then the investment will most likely be higher.

Want to know exactly what BENG glass will cost in your case?
Then fill out our quote form and receive 3 reliable quotes from certified BENG glass installers in your area.

Want to order for business? Then email us at info@bengproducts.nl.

Whether you have wooden or aluminum window frames, BENG glass's vacuum glass fits virtually any window. Thanks to its clever construction and ultra-thin thickness of just 8.3 mm, our glass is designed to fit into existing window frames. That means no unnecessary renovations, no expensive new window frames and no hassle.

And the best part? You retain the authentic look of your home. Perfect for monumental buildings, homes from the 1930s or any home where character plays a role. This way you combine top insulation with style and atmosphere.

Did you know.
If necessary, we can even thicken the glass (hybrid vacuum glass) or laminate it so that it fits any profile - completely customized. Easy, isn't it?
We then place an extra cavity and/or pane against the vacuum glass package.

One of our regular partners in the field of aluminum window frames is Smits Kozijnen. Want to know more about our partnerships or curious about reliable installers in your area? Then be sure to take a look at the partner page.

BENG glass comes in different thicknesses, so we always have the perfect match for your windows. This prevents distortion, warping and other hassles .
The larger the glass, the thicker the construction. Glass thickness is determined based on the surface area of a single pane of glass:

• 8.3 mm: up to 3 m²
• 10.3 mm: from 3 to 4 m²
• 12.3 mm: from 4 to 4.8 m²
• 16.3 mm: from 4.8 m²

Is BENG glass too thin for your window frames? No problem!
BENG glass is ultra-thin, but if your frames are a bit wider than 16.3 mm, we can also thicken (BENG glass Hybrid) or laminate the glass. This way it even fits perfectly into wider profiles, without having to replace your frames.

Not sure what thickness best suits your windows? No stress, we are happy to help you with a personal advice that fits your situation perfectly!

If you've ever looked closely at vacuum glass, you may see them: little dots between the two sheets of glass. We call those spacers.

Spacers are tiny supports in the vacuum cavity (the space between the glass panes). They keep the glass layers from being pulled together when the air between them is removed. Without these supports, the glass could literally break due to the pressure.
In BENG glass, the spacers are:

• Placedonly every 55 mm - which is much less than other brands of vacuum glass.
• Anthracite in color, making them much less noticeable than clear or silver variants that reflect light.

Benefit for you?
A nice, calm and undisturbed view through your windows, without distracting reflections or a "grid"-like effect you sometimes see with other vacuum glass types.

Note, however, that during condensation season, you may see a sort of "dam" pattern on the glass. This means that condensation forms everywhere on the glass except around the spacers. That's because these little supports allow heat to pass through a little better, so moisture is less likely to set on the outside.
Fortunately, there are special anti-condensation coatings available that can help reduce this effect, keeping your windows looking nice longer - even in humid conditions.

Only at BENGglas do you get titanium vacuum glass from LandVac - one of the many unique aspects that set BENGglas apart.
With it, you'll immediately enjoy powerful benefits:

• Titanium spacers reduce heat conduction by as much as 70%
• Titanium absortion strips extend product lifetime
• Flexible edge sealing reduces stresses by 90% and increases bending strength by 40%

If you choose titanium vacuum glass from BENGglass, you are choosing longer life, maximum strength and superior insulation!

Vacuum glass is all about innovation - and at BENGglas, we are leading the way!
With our exclusive Titanium Vacuum Glass technology, we set a new standard you won't find anywhere else.

This unique technology provides:

• 70% less heat loss thanks to titanium spacers
• Longer lifespan with titanium getters
• 90% less stress and 40% more flexural strength through flexible titanium seal
• Extra resistance to corrosion and wear, even under harsh conditions
• Lower energy consumption all year round

In short: if you choose titanium, you choose maximum lifetime, strength and insulation!

Want to know more? Check all details and advantages on our website

Laminated vacuum glass is used in places where extra safety, soundproofing or structural strength is important in addition to insulation. Think of glass at height, roof glazing or in situations where you have high noise levels.

In many cases it is even mandatory, for example if there is a risk of falling through or in roofs. The film between the layers of glass ensures that the glass does not break into sharp shards when broken - making it safer and more comfortable in everyday use.

• Facades
  As standard, BENG glass is injury-resistant on both sides: when broken, it disintegrates into small grains. In facades with height differences, laminated glass is mandatory, avoiding the risk of falling through.
  Thanks to the built-in UV filter in PVB film, furniture and floors are less likely to discolor.
• Roof glazing
  With overhead glass, safety is not a choice but a requirement. Laminated vacuum glass is the standard here: when broken, it stays together and prevents shards from falling down. Daylight comes in as normal, while the UV filter prevents discoloration of floors and furniture.
• Living past crowds? More quiet indoors?
  Noise from (air) traffic, neighbors or a schoolyard can be distracting. With acoustic laminated glass, the noise level goes down noticeably. A special interlayer in the glass absorbs some of the sound vibrations - ideal for bedrooms, work spaces or simply more peace and quiet in the living room.

In most cases, yes. Laminated BENG glass is available from as little as 13.06 mm thick, which is thinner than triple glazing. Having doubts about whether it will fit? Then we can look with you or engage an authorized dealer in your area.

With BENG glass, you can choose from three different films between the glass layers: EVA, PVB and SGP. They all ensure that the glass stays together neatly when broken, but each type has its own advantages.

• EVA (Ethylene Vinyl Acetate) is versatile, highly resistant to moisture. clear and suitable for most standard applications
• PVB (Polyvinyl butyral) is considered the industry standard in construction and within NEN standards
• PVB SoundControl This variant of standard PVB has additional soundproof properties
• SGP (SentryGlas Plus) is the ultimate option: SGP can be up to five times stronger and up to 100 times stiffer than PVB, allowing thinner glass constructions that still meet the same safety standards. SGP is also more resistant to moisture and extremely clear.

We'd be happy to help you choose which film is right for your project.

Vacuum glass was first patented in Germany in 1913. Yet it was not until 1996 that the first commercial products appeared - originating in Japan and South Korea. These early versions were still of limited use and not suitable for broader applications in construction.

The real breakthrough didn't come until 2016, when LandGlass became the first in the world to launch a fully tempered, tested and certified vacuum glass: LandVac®. Since then, the technology has continued to develop at lightning speed - resulting in a high-quality, reliable and durable titanium vacuum glass.

This was followed in 2019 by Fineo (from AGC), intended for lighter applications. But those opting for maximum performance in terms of insulation, safety and longevity will end up with LandVac.

BENGglas is the exclusive importer of LandVac in the Netherlands, Belgium and several other European countries.

Vacuum glass consists of two sheets of glass at least 4 mm thick, with a vacuum cavity of only 0.3 mm between them. Because there is no air or gas present, heat and sound transmission is virtually eliminated. An additional heat-reflective coating also blocks heat radiation.

With a total thickness of only 8.3 mm, you thus achieve an insulation performance that is two to three times better than HR++ glass - even when installed at an angle.

Depending on the brand of vacuum glass, the insulation value is usually between 0.35 and 0.70. Only with BENG glass do you benefit from the best possible value as standard: U=0.35.

The sound attenuation is also higher with vacuum glass. Whereas HR++ often stops around 31 dB, vacuum glass starts at a minimum of 30 dB. BENG glass takes this a step further and has a noise reduction from 36 dB. In laminated versions, this even rises to -42 dB. Ideal for those who want peace and quiet in their homes.

Longevity is another big advantage. HR++ lasts 20 to 25 years on average, triple glass up to about 30 years, while vacuum glass has a lifespan of up to 50 years.

What is the difference between vacuum glass and regular insulating glass?

Regular insulation glass - such as double glazing, HR++ or triple glazing - consists of two or three panes of glass with a gas-filled cavity. This acts as insulation, but remains more sensitive to heat conduction. As a result, the insulation value is lower(U=0.70-1.10) and the performance decreases as soon as the seal is damaged by weathering or corrosion, for example. The average service life is about 20 to 30 years.

In addition, standard insulation glass is much thicker (from 21 mm). As a result, window frames often need to be modified or replaced. With vacuum glass, this is usually not necessary.

Advantages of vacuum glass

• fits into existing window frames
• Insulation up to three times better than HR++ (depending on the brand)
• lifespan up to 50 years
• no drop in insulation value when inclined
• strong noise reduction
• more comfort: cool in summer, warm in winter
• no condensation on the inside

Why BENG glass is unique

• the highest insulation value in the world: U=0.35
• the best noise reduction: from 36 dB to 42 dB in laminated versions
• up to seven times fewer spacers than other brands for extra transparency
• standard safety glass (toughened) from 8.3 mm (NEN3569)
• manufactured with patented titanium technology for extra strength, insulating power and service life
• independently tested by ift Rosenheim (2024)
• provided with European test reports
• Produced on 100% green energy
• free of heavy metals

When is vacuum glass interesting?

• Renovation of existing buildings
  Due to its thin construction, it often fits directly into existing window frames, preserving the original appearance.
• New construction and energy-efficient homes
  Vacuum glass helps achieve high insulation standards and ensures a pleasant indoor climate.
• Noise reduction
  Perfect for homes in urban areas or along busy roads.
• Projects with high sustainability or comfort requirements.
  Vacuum glass saves more energy than other types of insulating glass and consists of 30% less material than triple glazing. On top of that, BENG glass is produced with green energy and delivers a substantial CO₂ reduction due to its extremely low U-value. Ideal for projects that need to be future-oriented and sustainable.

Vacuum glass varies in thickness depending on the brand you purchase. This can be as low as 6.3 millimeters for untoughened vacuum glass, but often the minimum glass thickness starts at 8.3 millimeters. Depending on the window area, this can go up to a minimum glass thickness of 16.3 millimeters.

The minimum glass thickness in BENG glass:

BENG glass's vacuum glass consists of two sheets 4, 5 or 6 mm thick with a vacuum space of only 0.3 mm between them. This brings the minimum glass thickness to 8.3 millimeters for tempered vacuum glass.

Depending on the desired window area, the minimum glass thickness is determined.
The larger the pane, the thicker the construction must be to prevent deformation or warping:

• up to 3 m²: 8.3 mm
• from 3 to 4 m²: 10.3 mm
• from 4 to 4.8 m²: 12.3 mm
• from 4.8 m²: 16.3 mm

Since BENG glass is available up to even 4,120 mm (where other vacuum glass brands can only produce up to 2,500 mm), it can happen that the pane thickness has to be 16.3 mm.

Do you prefer thicker vacuum glass anyway?
BENG glass can be thickened or laminated. This means that either an extra pane or an extra cavity with pane is placed against the vacuum glass package. This increases the total thickness. Depending on the desired final thickness, we can fully customize the composition.

This way you are always assured that you can keep your window frames.

Not sure what thickness best suits your windows? We would be happy to help you! Be sure to contact us.

Vacuum glass works completely differently than traditional double glazing or HR++ glass. Because the cavity is vacuum, the glass performs much better ánd looks different up close. Below are the characteristics by which you can recognize vacuum glass - and specifically BENG glass.

1. The unique combination of glass thickness and insulation value

Vacuum glass immediately stands out because of the ratio between thickness and performance. With a glass construction from 8.3 mm - and even 6.3 mm for some unhardened versions - you can achieve an insulation value of U=0.35 to 0.70.
With regular insulation glass, this is impossible.

With BENG glass, you benefit from the highest insulation values within all vacuum glass brands: U=0.35 to 0.50, depending on the type chosen. So you preserve your window frames while enjoying the best insulation value worldwide.

2. Absorption strips

On the longest side of the vacuum glass is an absorption strip that removes moisture from the cavity during the vacuum process.
After installation, if the installation instructions have been followed, this strip disappears completely behind the glass slats.

Depending on the pane length, BENG glass has one or two absorption strips. More details can be found in our technical drawings.

3. The spacers (the small dots in the glass).

Each brand of vacuum glass has small dots in the glass: the spacers (also called microspacers or micropillars).
The distance between these dots, as well as the color, varies among manufacturers.

• BENG glass: spacers every 55 mm.
• Other brands: often 25-40 mm

With BENG glass, the spacers are always in non-reflective antractite. This prevents reflective sunlight, allowing the spacers to actually light up. All BENGglas dealers have product samples, so you can see the spacers for yourself.

4. Edge seal

A colored edge seal is a clear identifying feature of vacuum glass. You can often tell immediately by the color which brand it is.
With BENG glass, you can recognize the edge seal by:

• Nicely rounded corners - important for maintaining vacuum
• Edge height of approx. 9 mm all around
• Total visible height of approx. 13-14 mm including absorption strip
• Specific colors: white, dark red or light yellow
  (BENG glass never has green, dark yellow or other different colors).

5. Hardly any chance of thermal breakage

Because BENG glass is tempered as standard, the chance of thermal breakage is very low.
Only in exceptional cases can it still happen.

How do you recognize thermal breakage?

• The crack always starts at the edge of the glass
• Runs straight to the warmest/coolest part
• Then it bends and continues in a jagged fashion

Are you unsure if your window has a thermal break? Feel free to contact us, we'd be happy to take a look with you.

Want to be sure if you have BENG glass?
Contact us or check this page for more information. We'll be happy to help you further.

Vacuum glass works in a different way than traditional insulating glass. Whereas HR++ and triple glass use air or gas between the panes of glass, with BENG glass the cavity is completely evacuated. This provides performance that simply cannot be achieved with regular insulation glass. Here are the main differences:

1. By far the best insulation value available

BENG glass offers the best insulation value worldwide. You save more heat and increase comfort in your home.

• BENG glass: U=0.35
• HR++ glass: U=1.10
• Triple glazing: U=0,70

2. Fits into existing window frames, preserving authentic appearance

BENG glass is extremely thin and almost always fits into existing window frames. HR++ and triple glass are much thicker and often require replacement of your window frames. So with BENG glass, you preserve the appearance of your building while enjoying impressive insulation performance:

• BENG glass: 8.3 mm
• HR++ glass: 21 mm
• Triple glazing: 38 mm

3. More daylight and extra clear glass (LTA).

Because BENG glass is so thin, the glass remains beautifully clear. Despite its extremely good insulation value, it lets in up to 15% more daylight than triple glazing, for example. There are variants that are extra clear or sunproof, depending on your needs.

• BENG glass: >83%.
• HR++ glass: >80%.
• Triple glazing: >65%.

4. Stable performance with horizontal installation

With BENG glass, the insulation value always remains stable even when the glass is placed at a horizontal inclination. With traditional insulation glass, the performance drops significantly.

• BENG glass: remains stable
• HR++ glass: up to -60%.
• Triple glazing: up to -40%.

5. Maximum noise reduction

BENG glass delivers strong performance at all pitches. With a laminated version or acoustic foils, the attenuation can increase even further.

• BENG glass: 36 dB (-2; -3). Laminated up to 39 dB, with acoustic foils up to 42 dB.
• HR++ glass: 31 dB (-1; -4)
• Triple glazing: 33 dB (-2; -6)

Based on the above data, HR++ usually attenuates between 30 and 37 dB and triple glass between 31 and 27 dB, with low tones in particular being less well attenuated. BENG glass remains stable around 34-33 dB and therefore performs broadly. In laminated versions or with additional acoustic foils, this BENG glass increases further.

6. Lifetime

The performance of BENG glass remains at the same level for decades, without relapse.

• BENG glass: up to 50 years stable
• HR++ glass: 20-25 years, with gradual decline in U-value
• Triple glazing: ± 30 years, with gradual decline in U-value

Yes. Toughened vacuum glass is significantly safer than untoughened vacuum glass. The toughening process makes the glass up to five times stronger, able to withstand large temperature differences and better able to withstand pressure loads.
When broken, tempered vacuum glass breaks into small, blunt grains, minimizing the risk of injury. Unhardened vacuum glass, on the other hand, breaks into sharp shards and offers no injury safety.

This is why BENGglas always works with toughened vacuum glass that complies with NEN3569. This ensures maximum safety, stability and durability.

If all of the Netherlands switches to BENG glass, we realize structural CO₂ savings of as much as 4.1 megatons per year - that's equivalent to 170,000 car trips from Amsterdam to Paris! In production alone, BENG glass saves over 24,000 tons of CO₂ annually . For an average home, BENG glass means a saving of 1,800 kg of CO₂ per year, which over 50 years can increase to as much as 90,000 kg of CO₂ per home. BENG glass thus contributes directly to achieving our climate goals: it can achieve more than 8% of the CO₂ reduction in the built environment by 2030 and help the Netherlands become climate neutral by 2050. It's not just any glass, it's a revolution in sustainable building.

The climate crisis calls for radically different solutions. Yet the biggest energy leak in buildings often remains invisible: the glass. BENG glass is not just insulation glass, but a pioneering technology with a U-value starting at 0.35 W/m²K - almost twice as good as triple glazing (0.70), three times better than HR++ (1.10) and better than any other brand of vacuum glass. Moreover, BENG glass lasts an average of 50 years, twice as long as traditional glass, and is produced using 30% less material compared to HR++ glass.

This means concretely:

• Only one production cycle every 50 years, with 50% less raw materials and transportation
• Structurally 50% less CO₂ emissions during production
• Up to 30% less glass volume and lighter weight, saving building materials and assembly time
• Suitable for any existing frame thanks to its revolutionary thickness of only 8.3 mm

BENG glass combines enormous energy savings with a drastic reduction in environmental impact - an innovation that is not only smarter, but also indispensable in the energy transition.

Want to know more? Read more here .

Absolute. BENG glass is manufactured by LandVac, a world leader in vacuum glass and an absolute industry leader. LandVac combines advanced technology with a strong focus on sustainability, making BENG glass not only superior in terms of insulation, but also environmentally friendly.

Production takes place in a state-of-the-art factory that runs entirely on green electricity generated by a nearby reservoir and a large amount of solar panels. These renewable energy sources ensure an extremely low carbon footprint during the production process.

In addition, BENG glass carries the CIC Green Product Certification, an internationally recognized seal of approval that demonstrates that the product meets the highest standards of sustainability, environmental friendliness and socially responsible manufacturing. This certification confirms that BENG glass is a future-proof product that not only contributes to energy savings in buildings, but also to reducing the impact on our planet.

So with BENG glass, you are choosing groundbreaking insulating glass made in a responsible and sustainable way - insulating glass that makes a difference, from production to years of use.

The price of vacuum glass is slightly higher than traditional insulation glass, but that doesn't say it all. Because with BENG glass you also save on:

• new window frames (which are often needed with HR++)
• replacement costs due to twice the lifespan
• extra hinges and locks
• your energy bill with a stable U-value for up to 50 years
• and your energy label - resulting in a higher home value. Thus, the effective payback period is often 0 years.

In addition, there are attractive subsidies on vacuum glass, which in the Netherlands can be as much as €46 per m².

Our consumer advice price?
As a guideline, you can count on a price starting from €285 per m²(excl. VAT, transport and installation, based on 1 m²).
The final cost depends on your specific situation: type of frame, choice of glass (e.g. laminated or solar control) and any additional requirements such as painting or finishing. It is therefore difficult to give an exact price. Would you like a quote including installation? Then fill in our quotation form and receive 3 quotations from 3 authorized dealers in your area.

That way you can make an honest price comparison!

Want to know for sure what your project will cost?
Then fill in the quotation form. You will receive a free proposal from three authorized BENG glass dealers in your area. So you know immediately where you stand - with no surprises later.

At BENGglas, we understand that you don't want to spend a long time getting an honest price comparison.
By filling out our quote form , you will immediately receive three quotes from three authorized dealers in your area. These quotes include both delivery and installation of the vacuum glass.

Would you still prefer to decide yourself from whom you get a quote? That's easy, too.

Useour Dealer Finder byentering your zip code. You will then immediately get an overview of BENG glass dealers in your area, including their contact details and their own page with a quotation form. If desired, additional work, such as painting, can also be included. In this way, our dealers always offer a complete total solution.

All BENG glass dealers have sample windows, so you can view the glass and make an informed choice. You are also welcome to visit our showroom by appointment to experience the possibilities in person.

Is there no dealer near you? Then ask your local glazier to contact BENGglas at info@bengproducts.nl.

BENGglas delivers the vacuum glass directly if you only need glass, without installation. Want to have the glass professionally installed as well? Then we advise you to use our dealers - experienced professionals who know exactly how to work with BENGglas.

Use our handy quote form to easily request 3 quotes from authorized dealers in your area. That way, you'll quickly get a fair price overview and choose the professional that suits you best!

Already have a local glazier you want to work with? Then feel free to ask him to contact us directly!

No dealer near you yet?
We are rapidly expanding our dealer network, but of course it may happen that there is no dealer near you yet.

No worries!
Feel free to ask a local glazier you trust to contact us. We will make sure the products are delivered to them, so you can still be assured of the glass solution you had in mind!

As LandVac's exclusive distributor, BENGglas offers direct access to the leading titanium vacuum glass. As a result, only at BENGglas do you benefit from:

• Competitive pricing through exclusive distribution
• Insured manufacturer's warranty for up to 20 years
• Access to the latest innovations
• Personal service that thinks along with you

Good news! Thanks to the Sustainable Energy and Energy Saving Investment Subsidy (ISDE), you get a nice compensation if you preserve your home with BENG glass:

• € 25 per m² if you only replace the glass with BENG glass (registration code: KA18780)
• € 111 per m² if you also replace your window frames (report code: other)
• € 46 per m² if you live in a national monument and replace the glass with BENG glass

And it gets even better: if you also take other insulation measures, such as roof or floor insulation, the amount is doubled!

Do you doubt whether your home is a national monument? Check it quickly on RVO.nl.

Are you an entrepreneur and do you want to make your business premises more sustainable?
Then the Energy Investment Allowance (EIA) is for you! This allows you to get up to € 300 per square meter in tax benefits. Note: the investment must be at least € 2,500. Do not forget to apply for the subsidy within three months after installation via the eLoket of RVO.nl.

Do you live in Flanders? Then there is good news! When renovating your home or building, you can take advantage of the renovation premium. Do you replace your old glass with BENG glass? Then you get as much as €16 per m² back!

Subsidy application? Super easy:

1. Have BENG glass installed by an authorized dealer or contractor.
2. Apply for the premium via the online counter at Vlaanderen.be.
3. After installation, you get a certificate from the contractor, which you use with your application.

Saving money can be that simple!

ISDE subsidy for individuals and companies
Do you want to apply for the ISDE subsidy through RVO.nl? Then make sure you have the following items to hand:

• An invoice with a report code, the contact details of the installation company and the date of purchase and installation.
• Photos of the installation, plus proof of payment.
• The number of square meters of glass you had installed (note: do not include extensions).

Important: you must submit your application within 24 months of installation.

EIA subsidy for business customers
Do you have a business? Then you must apply for the EIA subsidy within 3 months after installation via the eLoket of RVO.nl. Make sure you have everything ready on time so you don't miss out on any benefits.

Subsidy in Belgium
Do you live in Flanders? Then simply apply for your renovation subsidy through the online counter at Vlaanderen.be. You will need the certificate of your approved contractor.

Good news! With the Sustainable Energy and Energy Saving Investment Subsidy (ISDE), you get a nice reimbursement if you make your home more sustainable with BENG glass.

• Only replacing glass?
  Then use notification code KA18780. This gives you a subsidy of €25 per square meter of glass.
• Want to replace both glass and window frames?
  In the eLoket choose the notification code 'Other'. Indicate in the free input field that it concerns BENG glass vacuum glass. Then the subsidy amount is automatically adjusted to €111 per m² for glass and window frames.
• Do you live in a national monument?
  Use notification code KA18780. Because you live in a monument, you get the adjusted subsidy of €46 per m².

And it gets even better: do you combine BENG glass with other insulation measures, such as roof or floor insulation? Then the subsidy amount is even doubled!

Do you live in Flanders? Then you can take advantage of the renovation premium when renovating your home or building. For replacing existing glass with BENG glass, you will receive no less than 16 euros per m²!

Extra high subsidies for national monuments!

Thanks to the Sustainable Energy and Energy Saving Investment Subsidy (ISDE), you receive an attractive allowance for making your home more sustainable with BENG glass:

✓ € 25 per m² for replacing glass with BENG glass (Report code: KA18780)
✓ € 111 per m² if you also replace the window frames (Report code: other)
✓ € 46 per m² for replacing glass with BENG glass in national monuments
+ Double the amount for additional insulation measures, such as roof or floor insulation!

Do you doubt whether your home is a national monument?
Go to RVO.nl for more information!

Are you an entrepreneur and do you want to make your building more sustainable?
With the energy investment allowance (EIA) you can benefit from a tax advantage of up to 300 euros per square meter! The investment must be at least 2,500 euros. Apply for the EIA subsidy within three months after installation via the eLoket of RVO.nl.

Thank you for your interest!

We are always looking for enthusiastic professionals who are just as much a fan of top quality and sustainable insulation glass as we are. But you don't become a BENG glass dealer overnight. Because we stand for quality, service and craftsmanship, we deliberately choose a carefully selected dealer network.

Would you like to become part of our network?
Then send an email to info@bengproducts.nl and tell us who you are, what you do and why you think BENGglas is a good fit for your business. We will then contact you soon to discuss the possibilities.

Good to know:
As a dealer you get access to our sample windows, plenty of marketing support, technical support and you will be included in our online dealer map so customers know how to find you easily.

We look forward to hearing from you!

The U-value indicates how well glass insulates. Simply put: the lower the U-value, the better the glass keeps heat in in the winter - and out in the summer. So you save on your energy bill and increase your living comfort.
The U-value is influenced by many factors, such as:

• The coating on the glass
• The filling between the glass layers (e.g. air, gas or vacuum)
• The cavity width - i.e. the space between the glass layers

How well does BENG glass score compared to other types of glass?
Here is an overview of the average U-values per type of glass:

• Single-glazing: 5.8 (insulation? Barely.).
• Double glazing (Thermopane): 2.8
• HR++ glass: 1,10
• HR++ / Triple glass: 0,70
• Other vacuum glass: between 0.45 and 0.70
• BENG glass: from 0.35 to 0.50

In short: BENG glass has by far the best insulation value of all.
So you save extra on your energy bill!

*U-values measured according to standards EN 674:2011 and ISO 19916-1:2018 by ift Rosenheim (2025).

BENG glass has an exceptionally low U-value starting at 0.35 W/m²K, which means that the glass insulates extremely well. By comparison, this is two times better than triple glazing (around 0.70 W/m²K) and three times better than standard HR++ glass (around 1.10 W/m²K). Thanks to this excellent insulation value, BENG glass saves significantly on energy costs and helps make your home more comfortable and sustainable. Moreover, this U-value is substantiated by reliable European test institutes such as ift Rosenheim and TÜV Rheinland, with recent reports from 2025 that you can consult in our knowledge base. So you can be sure that you are choosing quality and maximum energy savings.

When it comes to heat loss through your windows, it's not just about the glass itself. The transition from the glass to the frame also plays a big role. And that's exactly what the PSI value is about.

The PSI value shows the heat loss per meter of the edge of the window - exactly where the glass meets the frame. The lower that value, the less heat is lost along the edges of your window.
The PSI value is measured at a temperature difference of 1°C between inside and outside, per linear meter. In other words, how well does your window keep out the cold, even at the edges?
A low PSI value = less heat loss = lower energy costs.

Sound attenuation is expressed as a so-called Rw (C; Ctr) value. What exactly does it mean?

• Rw is the standard noise reduction value in decibels (dB).
• C is a correction for noise with many high-pitched sounds, such as children playing or fast road traffic.
• Ctr is a correction for noise with lots of low tones, such as humming city traffic or a nearby club.

The higher the Rw value, the better the glass blocks sound. But if you have a lot of low-pitched noise (such as traffic or loud bass), the Rw + Ctr value says the most about the actual attenuation.

An example:

A value of Rw (C; Ctr) = 30 (-1; -4) means the glass attenuates 30 dB on average, but in practice:

• 29 dB at higher tones (Rw + C)
• 26 dB at low tones (Rw + Ctr)

What are the scores for each glass type?

• HR++: 31 dB (-1; -4)
• HR++: 33 dB (-2; -6)
• BENG glass: 36 dB (-2; -3)

And you can see this in practice:

• HR++ glass attenuates between 30 and 37 dB, depending on pitch.
• HR++ is between 31 and 27 dB - less good at low tones.
• BENG glass remains stable at 34 to 33 dB - so strong performance at all pitches.

In short:
With BENG glass, you not only choose top insulation against cold, but also peace of mind in your home.

The LTA (light admission factor) value indicates how much natural daylight comes in through the glass. The higher the value, the more light enters your home - and you notice it right away.
Daylight not only makes your home more pleasant to live in, it also helps save energy. Because the more light that comes in, the less often you have to turn on the lights.

More or just a little less light? You choose

Not every room needs the same amount of light. In a home or building with a lot of glass or direct sunlight, a lower LTA value may actually be pleasant. This way you avoid bright glare, overheating or discoloration of furniture and floors.
For this reason, BENG glass offers various glass variants - from clear to more sun-resistant - with high and lower LTA values, depending on the function of the space and the location of your facades.
Whatever you choose: your insulation is always top notch, with a U-value of up to 0.35.

Want to know what best suits your plans? We are happy to think along with you.

The G-value (solar factor) indicates how much solar heat comes in through the glass. So: how much free heat from the sun do you actually feel inside?
Good to know: whatever G-value you choose, with BENG glass you are always assured of excellent insulation - much better than HR++ or triple glazing.
And it shows: your house loses less heat, stays warmer for longer and you don't have to heat as much. This makes a big difference to your energy bill, especially in the winter or in older homes.

What does differ is how much solar heat and daylight you let in.

• Higher G-value → more solar heat inside. Great for bright rooms or cold facades.
• Lower G-value → more solar heat blocked. Ideal for lots of glass, warm rooms or summer sun.

You choose what suits you
BENG glass comes in several variants, each with its own balance of light, heat and solar control.

Do you want extra daylight? More sun protection? Or just a little of both? You decide what's important - and whatever you choose:

• it simply fits into your existing window frames
• It is slim, light and super insulating
• it contributes to a more comfortable indoor climate

Below are the types that BENG glass offers and them G-values:

• BENGglas® Extra clear: 0.68
• BENGglas® Single Coated: 0.58
• BENGglas® Double Coated: 0.39
• BENGglas® Triple Coated: 0.33
• BENGglas® Solar Control: 0.29
• BENGglas® Monu: 0.68
• BENGglas® Monu Restover: 0.68

Looking for a different G-value? Even then we'd be happy to think with you. Please contact us to inquire about the possibilities.

Injury-safe glass means that when broken, the glass does not break into large, sharp pieces, but into small, unsharp grains. This greatly reduces the risk of injury - extra nice for safety in your home or building.

• Tempered glass (injury-safe): when broken, falls into small, round grains that are not sharp.
• Unhardened glass: breaks into large, sharp shards that can be dangerous.

At BENGglas, we think safety is very important. This is why our entire range is tempered as standard and therefore injury safe.

Tempered vacuum glass is vacuum glass in which both sheets of glass are tempered. This means that the glass is first heated to a very high temperature and then cooled at lightning speed. This process creates a permanent, internal stress that makes the glass up to five times stronger than ordinary, untoughened glass.

Whereas untoughened vacuum glass is more fragile and susceptible to breakage, toughened vacuum glass, like BENG glass, can handle large loads, pressure differences and temperature changes effortlessly. This is why toughened vacuum glass is also called safety glass (injury-safe glass).

Why is toughened vacuum glass so much stronger?

The following happens during the toughening process:

• The glass is heated evenly to about 650 °C
• The surface is then cooled very quickly
• The outer layers tighten
• The inner core cools slowly and remains under tension

That combination creates a glass structure that:

• is 5× stronger
• Is much more resistant to impact and pressure
• tolerates temperature variations without breaking
• remains stable and retains its shape - essential for vacuum glass

This virtually eliminates thermal breakage - glass breakage due to temperature stresses - in BENG glass.

How does tempered vacuum glass break (injury safe)?

If tempered vacuum glass does break, it does not fall into sharp, dangerous shards.
The glass disintegrates into small pieces, minimizing the risk of cuts.

Why do some brands still choose untoughened vacuum glass?

Unhardened vacuum glass is easier to produce, but :

• is more susceptible to thermal breakage
• is not injury-safe
• can handle less pressure
• is less suitable for large windows

So tempered vacuum glass is a higher quality grade.

At BENG glass you always get toughened vacuum glass

Many brands still supply untoughened vacuum glass.
BENG glass never does. With us, toughened, injury-safe vacuum glass is the standard - at no extra charge.

That means:

• more safety
• more stability
• higher durability
• better performance
• fewer risks

Laminated BENG glass offers tremendous possibilities: you can choose from three types of films (EVA, PVB or SentryGlas Plus) and a virtually unlimited range of counter glasses.

All film types ensure that no shards will come loose if broken. But it doesn't stop there - you benefit from many more smart advantages. Each film type has unique properties, giving the window - in addition to the superior insulation value of BENG glass - many extras, such as:

• fall-through safety - well safe at height, for all building functions
• Break-in retardation -not easy to get through
• extra sound insulation - from -36 dB to -39 dB or more, audibly quieter
• Better UV protection - your furniture stays nice longer
• colors and patterned glass - your window will completely change appearance

How you want to put together your laminated window is completely up to you. Think of patterned glass for a unique look, or additional films for maximum safety. Let us know what you are looking for - and we will be happy to think along with you.

At BENGglas®, transparency and reliability are paramount. Therefore, all our vacuum glass is tested according to the appropriate European standard: EN674:2011-06 or ISO 19916-1:2018-10.

The widely used standard EN673 expressly excludes vacuum glass. This method does not take into account the unique properties of vacuum glass, such as the vacuum space, micropillars and specific edge sealing. This can lead to U-values that appear too positive.

Testing according to EN674 gives us a realistic and accurate picture of actual thermal performance. No assumptions, no overestimates - just real results.

With BENGglas®, you therefore know exactly where you stand: high-quality, tested solutions that meet the highest standards.

Want to know more? Then discover the differences between EN 673 and EN 674 in our blog!

What does this mean in practice?
The insulation value of the glass is important, but the frame and that edge zone (the transition) count just as much. Here's what to expect with BENG glass in different combinations:

• Aluminum frame + BENG glass Hybrid
  PSI value: 0.035 - 0.04
• Wooden frame + BENG glass
  PSI value: 0.05 - 0.09
• Aluminum frame + standard BENG glass
  PSI value: 0 .09

BENG glass is not only very strong in insulation, but also effective in blocking sound. We measure this with the RW (C; Ctr) values - the higher the number, the quieter your home becomes. In general, the better the insulation value, the better the soundproofing. So by using the best insulation value, BENG glass also directly provides the best sound insulation!

Here are the figures at a glance:

• HR++ glass has an overall sound insulation of about 31 dB, with a range of 30 to 27 dB at low and high frequencies.
• HR++ glass or triple glass scores slightly better with an overall value of 33 dB, but at low and high frequencies the sound level can range from 31 to 27 dB.
• BENG glass goes one step further with an overall sound insulation of 36 dB and also performs very consistently between 34 and 33 dB at low and high frequencies.

What does that mean for you? BENG glass keeps sound out better, especially at those annoying low tones that easily bother you.
So you not only enjoy lower energy bills, but also a much quieter and more comfortable home.

BENG glass is available in different shapes. Not all shapes can be made (think circles), and the possibilities differ for each type of BENG glass.
Want to know exactly what is possible? Check out our handy overview - or just send us a message at info@bengproducts.nl, and we will be happy to help you!

Do you have a large order? Then there is often more possible than is listed. For a few pieces you can use the overview as a guideline.

Please note: we charge a standard surcharge of 50% for shaped windows.

Single glass? That will soon be a problem.
The court in Amsterdam has ruled that single glass in rental properties may be considered a defect. This could have significant consequences for at least one million homes in the Netherlands. In the case of this ruling, the landlord had to install double glass within four months or reduce the rent (Telegraaf, 2024).

Fortunately, there is a smart solution:
BENG glass fits into existing window frames, even if they now have single glass. So you can easily replace the glass with insulation glass that insulates up to two times better than triple glazing - without the hassle of new window frames.
For landlords who want to comply with regulations as well as make their homes more comfortable, BENG glass is a smart and sustainable choice.

The smallest standard size of BENG glass is 200 × 230 mm. Smaller is sometimes possible, as long as the diagonal is at least 300 mm.
The largest size? 2,350 × 4,150 mm - unique in the world of vacuum glass and another good example of why BENG glass stands out.

No. BENG glass,has been extensively tested for the presence of heavy metals such as lead, cadmium, mercury and chromium-6, as well as harmful substances such as PBBs (polybrominated biphenyls) and PBDEs (polybrominated diphenyl ethers).
The RoHS tests show that BENG glass does not contain these substances - which is good for both people and the environment!

Delivery time is approximately 12 to 14 working weeks.
Do you choose BENGglas Monu Restover? Then allow for an additional 3 weeks.

BENG glass vacuum glass looks different from standard insulation glass (with air or gas) and from other vacuum glass brands in several ways. Using the characteristics below, you can easily check whether you have actually received BENG glass.

1. The insulation value

BENG glass achieves insulation values of U=0.35, 0.40 or 0.50 with a glass thickness from 8.3 mm.
This combination of very thin glass and extremely low U-value does not exist with traditional insulating glass.

Do you have a thin pane, but a U-value higher than 0.50? Then in any case it is not BENG glass, but probably another vacuum glass brand.

2. The absorption strips

Along one of the long sides of the glass you will find one or more narrow absorption strips. The number depends on the size of the pane.

The exact position is shown in our technical drawings.
Does the location differ from what is written there? Then it may be a different brand of vacuum glass.

3. The spacers (the small dots)

The small dots between the glass sheets are the spacers. They prevent the glass layers from touching each other when vacuum is applied.

Only for BENG glass:

• Placement: always every 55 mm
• Color: non-reflective anthracite, so they do not glow in sunlight

Other brands of vacuum glass often have a spacing of between 25 and 40 mm or use other colors of spacers.

4. The distinctive edge seal

Every vacuum glass has a visible edge, but BENG glass has some unique features:

• Rounded corners that help maintain the vacuum for a long time
• Edge height: approximately 9 mm
• Overall height including absorption strip(s): 13-14 mm
• Colors: white, dark red or light yellow
  (With BENG glass, green or other different colors never occur).

In doubt whether you have received BENG glass?
Please feel free to contact us or check this page, We are happy to help you!

Ventilation grilles allow fresh air into your home even when your windows and doors are closed. They help wick away moisture, ensuring a healthy indoor environment. Especially with well-insulated glass such as BENG glass's vacuum glass, good ventilation is especially important, as otherwise the house becomes too "dense" and moisture problems can occur; insulation and ventilation often go hand in hand.

The good news?

There is a ventilation grid that works perfectly with BENG glass! Duco has developed the GlasVent ZR AK (+) type, specially designed to work well with vacuum glass. So you enjoy optimal insulation and fresh air.
Want to know more? Take a look at our Duco partner page.

At BENG glass, we think ahead. With an expected lifespan of no less than 50 years, we give you up to a 20-year warranty - that's twice as long as HR++ or HR+++ glass.

What is covered by the warranty?

• 20-year warranty on our basic range, without additional applications (layers/ hybrid etc.)
• Laminated variants: 10 years
• Fire-resistant versions: 5 years
• BENG glass Monu Restover: 5 years

Our warranty applies to the redelivery of your BENG glass window(s) free of charge if it loses its insulating effect within the warranty period. That way you can be sure you'll be fine for years to come.

Want to know more?
View the full warranty terms and conditions in our knowledge base.

We make every effort to deliver your BENG glass perfectly and carefully check each pane for insulation value before it leaves the factory. Still, sometimes something can go wrong, for example during transport or installation. No worries! We are ready to help your glazier quickly and properly.
Important: did you order your BENG glass through a glazier? Then the warranty application always goes through them. Did you order directly from us? Then you can contact us directly.

For fast and smooth warranty processing, we need the following information:

• Company name and contact person
• Order number
• Dimensions of the defective window (height x width)
• Short description of the problem
• Photos of the entire window, preferably from the inside
• Close-up pictures of the defect, also from the inside

The clearer the information, the faster we can help you with the warranty request. As soon as we receive the request, we will contact you as soon as possible and arrange the next steps together.

Vacuum glass not only lasts longer than traditional insulating glass, it also continues to perform as if it had just been installed. With standard insulation glass, the U-value slowly decreases after a few years. With BENG glass, it remains stable - for years.

How do we know for sure? In the lab, conditions of 25 years of use are simulated. Afterwards, the U-value was still exactly the same. Therefore, we confidently guarantee a 25-year service life, with an expected total service life of 50 years.

And with a 20-year warranty, BENG glass is well above the market standard - that's 10 years more than usual in the glass world.

At BENG glass, we think ahead. With an expected lifespan of as much as 50 years, we give you up to a 20-year warranty - that's twice as long as standard insulating glass.

What is covered by the warranty?

• 20-year warranty on BENGglas Extra Clear, BENGglas Single Coated, BENGglas Monu
• 5-year warranty on BENGglas Monu Restover

Our warranty applies to re-supplying your window(s) free of charge if it loses its insulating properties within the warranty period. So you can be sure you'll be fine for years to come.

Want to know more?
View the full warranty terms and conditions in ''documentation''.

There is currently no harmonized European standard that makes vacuum glass mandatorily covered by CE marking. View the full explanation and statement from TÜV Rheinland here . Therefore, BENG glass does not (yet) have a CE mark. But that doesn't mean you have to doubt its quality. BENG glass has, however, been extensively tested and certified.

Since its market introduction in 2016 (through Landvac), BENGglas has proven itself to be a reliable and innovative product, with no fewer than 429 patents!
Moreover, BENGglas has important quality statements and reports, such as:

• Independent and European insulation value reports by ift Rosenheim and TÜV Rheinland
• Toughness reports for safety and sturdiness
• A BCRG declaration, an independent seal of approval for quality and safety
• CIC Green Product Certification for environmental compatibility
• Noise value reports for optimum sound insulation from ift Rosenheim
• Rohs report stating that BENG glass is free of heavy metals

All these certifications ensure that with BENG glass you are choosing a product that meets high quality standards, even though there is no official CE mark.

At BENGglas, we take quality seriously. That's why all our U-values are confirmed by renowned European test institutes such as ift Rosenheim and TÜV Rheinland. The most recent reports, dating back to 2025, are transparently available in our knowledge base.
Important to know: not all vacuum glass suppliers can provide such solid, European test reports. With BENG glass, you can be sure that you are choosing proven insulation performance.

Yes, all types of BENG glass have an official BCRG declaration. This certification stands for independent quality and safety control and is an important proof that BENG glass meets stringent requirements for durability, safety and performance.

The BCRG statement gives you extra confidence in the reliability of BENG glass, in addition to other certificates and reports such as U-value reports, toughness reports, sound insulation reports.

Want to know more about the BCRG statement and other certificates of BENG glass? Then consult our knowledge base for comprehensive information!

BENGglas is the brand, LandVac the technology.
LandVac is the manufacturer of the vacuum glass, and BENGglas is the exclusive and therefore official distributor in the Netherlands, Belgium, Germany and several other countries in Europe. This means: direct access to the best technology and a network of professionals who know exactly how to install the glass professionally.

Because LandVac simply offers the highest standard.
LandVac was the first manufacturer in the world to market fully tempered and certified vacuum glass. In addition, LandVac uses unique titanium technology, which ensures a lifetime of up to 50 years and a constant insulation value up to U=0.35. Each panel is also rigorously tested immediately after production. So you get guaranteed top quality, with no surprises. in addition, LandVac is produced in LandGlass' high-tech factory (230,000 m²), with its own R&D center and more than 450 patents. Production meets international standards and is confirmed by European testing institutes such as IFT and TÜV.

BENG glass is unique - worldwide, in fact.

Where some vacuum glass brands stick to unhardened panes, small sizes and outdated production methods, BENG glass follows a completely different route. Our vacuum glass is toughened as standard and therefore injury safe, and is produced on a high-end 500-meter production line - developed by the pioneer in vacuum glass: LandVac.

BENG glass is the only vacuum glass in the world to use patented titanium technology, exceptional strength, large dimensions and a lifespan of up to 50 years. The result? The best insulating glass available today:

• An impressive insulation value starting at 0.35
• By far the fewest spacers on the market: per 55 mm (vs. 20-40 mm)
• Tempered and injury resistant as standard (NEN3569)
• Manufactured with titanium for extra insulation strength and durability

Below you can read step by step how our vacuum glass is made.

What is the production process of vacuum glass?

Vacuum glass consists of two glass plates of at least 4 millimeters thick with an extremely thin vacuum of only 0.3 millimeters between them. That vacuum prevents the conduction of heat as well as sound.
Making vacuum glass requires a lot of precision, high temperatures and strict quality controls.
Especially when you work with tempered vacuum glass, as with BENG glass, the process becomes more intensive and sophisticated.

Below is the full explanation.

1. Glass cutting process

The production process begins with the precise cutting of the glass sheets. Using a laser-guided machine, all panes are cut to exact dimensions - the settings are readjusted for each size.

• BENG glass is always delivered to size
• Maximum dimensions: 2,350 x 4,150 mm
• The panes are 4, 5 or 6 mm thick, depending on the total pane area

Some manufacturers vacuum a large pane first and then cut it. This is only possible with untoughened glass. BENG glass uses only tempered glass, and that requires customization from the first step.

2. Titanium edge finishing - unique in the world of vacuum glass

After cutting, the edges are primed and coated with an ultra-thin layer of titanium. This is a patented technique exclusive to BENG glass and has an immediate positive impact on the insulation, lifespan and stability of the glass.

Advantages of titanium in vacuum glass:

• Up to 70% less heat conduction
• A much longer lifespan thanks to titanium absorption technology
• 40% stronger edge connection
• 90% less tension in the glass
• High resistance to corrosion and wear

This step is the basis for the exceptional performance of BENG glass.

3. Precise glass cleaning (washing process)

Vacuum glass must be absolutely clean. In a computer-controlled washing plant, dust, dirt and micro-particles are completely removed. This is essential because any contamination within the vacuum is irreversible.

4. Glass tempering - injury-safe vacuum glass according to NEN3569

With BENG glass, each panel is tempered.
The glass panels are gradually heated to about 650°C and then rapidly cooled.

This makes the glass:

• up to 5x stronger
• resistant against large pressure differences
• dimensionally stable → the vacuum remains stable for years
• safe when broken (unsharp grains)
• suitable for temperature variations and prevents thermal breakage

Many vacuum glass brands use untoughened glass. BENG glass does not - and that makes all the difference in safety and performance.

5. Application of spacers and absorption strips.

Next, the spacers and absorption strip are applied to the tempered glass.

• The spacers distribute pressure during vacuum drawing.
• They are made of titanium
• They prevent the glass from breaking during the vacuum process

Unique to BENG glass:

• Up to 7× fewer spacers
• Only 1 spacer per 55 mm
• Other brands: 20-44 mm
• Fewer spacers = far fewer thermal bridges
• This allows us to achieve U-values as low as 0.35

The absorption strip - always on the longest side - captures residual gases during and after the vacuum process. This is essential for long-term vacuum retention. With BENG glass, it is placed in a rill so that its position is always within a height of 13-14 mm. As a result, when properly installed, it falls neatly away behind the window frame.

6. The vacuum process - complete removal of air

In a state-of-the-art vacuum chamber, the two glass sheets are brought together and the gases between the sheets are completely vacuumed out.
This process takes several hours.

This is where the extremely thin vacuum chamber (0.3 mm) is created that provides the high insulation value of vacuum glass.

7. Edge sealing with titanium - the key to a long service life

When the vacuum is at the right level, the edges are sealed with induction under vacuum.

Thanks to titanium:

• the edge connection is up to 40% stronger
• The material hardly reacts with moisture and gases
• the vacuum remains stable for years
• the window is more resistant to wear and tear and stress

The edge is the most defining component of vacuum glass - and that's exactly where BENG glass makes the biggest difference.

8. Strict quality control of each pane

Finally, each pane of glass is extensively tested in the LandVac plant for:

• vacuum retention
• glass strength
• insulation value
• density
• general stability

Only when all the values are exactly right does the pane go on transport.

Why the production process of BENG glass is so advanced

Vacuum glass seems simple at first glance - two sheets of glass, one vacuum.
But in reality, it is a process that consists of:

• a 500-meter production line
• 429 patents
• high-end tempering furnaces
• advanced automation
• titanium technology used nowhere else

With this, BENG glass sets the absolute standard for vacuum glass:
slim, injury-safe, extremely strong and with an insulation value found nowhere else.

Up to 50 years of service life thanks to BENG glass's titanium technology

Whereas traditional insulation glass loses its performance over time due to leaking seals, BENG glass remains completely airtight for years. This is due to the patented titanium edge seal, in which the glass sheets are fused at the edges and hermetically sealed. As a result, BENG glass lasts up to two times longer than standard insulating glass: up to 50 years.

Why titanium is so powerful

• Much less heat conduction due to titanium spacers (approximately 70%)
• Longer life thanks to a titanium absorption strip that keeps the vacuum stable
• Up to 40% stronger, with 90% less stress build-up
• Excellent protection against corrosion and wear

In short: titanium gives BENG glass maximum insulation strength as well as an impressive lifespan.

Titanium reduces heat conduction, strengthens edges and extends the life of the vacuum. It provides up to 70% less heat loss and a 40% stronger edge connection.

Because the glass is up to five times stronger due to the toughening process. As a result, fewer spacers are needed to distribute the pressure during the vacuum process. Fewer spacers means fewer thermal bridges and thus a better insulation value. Therefore, with BENG glass you are assured of vacuum glass with the best insulation value worldwide: U=0,35