Over BENGglas

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.

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.

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.

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 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!

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.

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.

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.

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

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.

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.

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.

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!

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

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