Frequently Asked Questions

A leak in HR++ or Triple insulating glass occurs because the frame, which holds the glass plates together, is not airtight. This allows the noble gas to escape over time and condensation to form. The edges of vacuum glass, on the other hand, are fused together so that the vacuum remains intact. As a result, vacuum glass retains its insulation value. In contrast to HR++ or Triple glass, no degradation takes place and the U-value remains at 0.4 for type BENGglas . Even if the glass is placed at an angle, there is no loss of insulation value.

Aged insulating glass has a high U-value (insulation value), which could cause condensation moisture to form on the inside of the glass. Because the U-value has greatly improved, condensation will only occur on the outside during the 'condensation' season. This does not have a disturbing effect and does not damage the panel.

To prevent the glass plates from being pressed against each other by the vacuum, microscopic spacers have been placed over the entire glass surface. BENGglas has the smallest and fewest spacers of all brands and available types of vacuum insulating glass.

When you choose vacuum glass, you will always have to deal with absorption points or absorption strips. The vacuum valve can sometimes be avoided by means of special production techniques.

The vacuum valve is intended to remove air from the insulating glass.
The absorption points are intended to extract the moisture between the glass panels. The combination of both creates a vacuum that prevents conduction. Without conduction, heat remains inside and cold outside (or vice versa in summer), which ensures the best insulation value.

Vacuum glass insulates better, but also retains its U-value after 25 to 50 years.
Unlike other types of insulating glass, vacuum glass is airless, so no conduction can occur. This keeps heat inside and cold outside (and vice versa in the summer).

The conductivity is much greater with other types of glass, as they are processed using air or rare gas. Over time, these gases escape through the frame, causing other insulating glass (for example: HR ++ or Triple glass / HR +++) to lose its original insulation value.

Compared to traditional forms of insulating glass, BENGglas has an insulation value that is many times better. In fact, BENGglas offers the best insulating glass in the world with its U-value of 0.4.

BENGglas is the only brand that supplies its insulating glass with tempered glass as standard and is very competitively priced compared to regular vacuum glass. Moreover, BENGglas has fewer and smaller spacers than its competitors.

By means of a lab test, conditions over a period of 25 years can be simulated. After such a test, the U-value appeared to have been fully maintained. That is why BENGglas guarantees a lifespan of 25 years. The expected lifespan is 50 years.

The initial investment of BENGglas is higher than with traditional insulating glass or triple glass. But because of the much better insulation value - which does NOT fall back over the years - you will quickly earn back this. The payback period will of course depend on energy prices which will certainly rise in the future.

order vacuum glass directly from BENGglas info@bengproducts.nl or by requesting a customized quote (including installation) from one of the BENGglas dealers on www.bengglas.nl. bengglas .nl/dealers . If you cannot find a suitable dealer, you can always contact your local glazier.

BENGglas BASIC is our entry-level model and has a suggested retail price of € 245 per m² (excl. VAT and excl. installation). Type BENGglas has a suggested retail price of € 295 per m² (excl. VAT and excl. installation).

The exact price of BENGglas will depend on the thickness, dimensions, installation height, etc. Our dealers can provide you with a correct competitive quote.

ISDE subsidy is available at BENGglas This is €23 per m² for replacing your glass. If you also replace your window frames, you are eligible for a subsidy of € 65.50 per m². Business customers are eligible for the energy investment deduction (EIA); this can amount to € 300 per m². These subsidy amounts double if you take a 2nd measure (or more). Source: www.rvo.nl .

ISDE subsidy is available at BENGglas . This is €23 per m² for replacing your glass. If you also replace your window frames, you are eligible for a subsidy of € 65.50 per m².

Business customers are eligible for the energy investment deduction (EIA); this can amount to € 300 per m². These subsidy amounts double if you take a 2nd measure (or more).

Source: www.rvo.nl .

You can apply for a subsidy for replacing your glass with reporting code KA18780.
If you also replace your window frames, you can use report code KA19317.

You can submit the grant application at www.rvo.nl.

The sound reduction of BENGglas is 36 dB.

BENGglas starts with a thickness of 6.3 mm, increasing to 20.3 mm in total. Further thickening with eg insulating glass is one of the possibilities.

BENGglas can be thickened to the desired thickness. An extra cavity including counter pane is then placed behind the BENGglas . The cavity options are 6, 9, 12, 15, 18 or 20 millimeters thick with a counter pane of 4 or 5 millimetres. The U-value of your insulating glass remains the same even after this thickening.

BENGglas can be manufactured in a layered or drawn variant. BENGglas laminated is often used in roof glazing for extra burglary protection and sound insulation (noise reduction = 36 dB).

Type BENGglas BASIC can only be ordered with a single coating. With BENGglas type, you can choose between a single (S.1.16) or double (D80) coating. These coatings influence the U value, LTA% value (light entry factor) and the G value (solar entry factor). These values ​​are lower with a double coating than with a single coating. This means that you achieve a better insulation value and sun protection with a double coating.

BENGglas is easy to install, comparable to installing HR++ glass. Since the coatings are processed on one side, the vacuum cap ( BENGglas , BENGglas PRO, BENGglas +) or the absorption strip ( BENGglas BASIC) must be mounted on the inside.

The sealant must be free of plasticizers and linseed oil.
Work must be done on a clean, dust- and grease-free painted surface.
Follow the instructions of the respective kit manufacturer.

Recommended and approved sealants for BENGglas are:

• Flour – Easyseal-XPS
• Flower – Renoseal
• Flour – MSP Oneseal
• Swallow Den Braven – Monustop
• Dow– Dowsil 982
• Kömmerling – GD920

Yes, but unfortunately not all shapes are possible (e.g. circles). Given the number of possible shapes, we would like to receive your request via info@bengproducts.nl so that we can discuss the possibilities with you.

Yes. BENGglas fits perfectly in old window frames because it is so thin. But BENGglas is also an excellent product for new construction with wooden, plastic or aluminum frames.

The smallest size BENGglas is 300 x 300 mm. Smaller is possible if 1 side is larger than 300 mm on type BENGglas BASIC.

The largest vacuum glass size available is 1750 x 3000 mm.
The larger the glass surface, the thicker the glass structure will be.
We use different thicknesses BENGglas (from 8.3 – 10.15 to 10.30 and 12.3 mm).

The advice is to order BENGglas from a surface of 1.5 m at a minimum thickness of 10.15 mm.

In addition to the standard version, there are options for extra clear, extra sun-resistant, frosted glass and laminated hardened vacuum glass. A dirt-repellent coating can also be applied as an option.

BENGglas has 4 types of vacuum glass in its range: BENGglas BASIC, BENGglas , BENGglas PRO and BENGglas +. BENGglas and BENGglas + have a cap in the bottom corner. BENGglas BASIC and BENGglas PRO do not have this.

BENGglas is an agent and importer of BENGglas . This means that BENGglas only supplies vacuum glass and does not measure or install your glass. BENGglas has an extensive network of more than 150 dealers in Europe who offer a total solution. You can find this on our website www. bengglas .nl/dealers .

BENGglas is happy to welcome dealers! BENGglas does, however, impose a number of conditions on a dealership. BENGglas also wants to protect its dealers by not taking on too many parties in one region. You are therefore kindly requested to first express your interest by sending an email to info@bengproducts.nl .

Because the hardened vacuum glass is so thin (from 6.3 mm), it is an excellent product for renovation. You use your old window frames and only need to exchange the old glass for BENGglas . In this way you can provide your (historical) building with extremely good insulating glass.

The delivery time is approximately 12 working weeks.

Do you want monumental glass? Then take into account + 3 weeks.

The U-value indicates the thermal insulation value of a product (in this case vacuum glass). The lower the U-value of a product, the better this product insulates. BENGglas has the lowest U-value in the world of all types of insulating glass (U=0.4) and therefore offers the best thermal insulation.

Below you will find an overview of the average U-values ​​per type of glass:

• BENGglas : 0.4
• BENGglas BASIC: 0.58
• Other brands of vacuum glass: 0.7
• Triple glass or HR +++: 0.7 / 0.8
• HR ++ glass: 1.1
• Double glazing (Thermopane): 2.8
• Single glass: 5.8

For each type of glass, several factors determine the U-value, including the coatings, filling (vacuum, gas or air) or the cavity widths. Below you will find an overview of the average U-values ​​per type of glass:

• BENGglas : 0.4
• BENGglas BASIC: 0.58
• Other brands of vacuum glass: 0.7
• Triple glass or HR +++: 0.7 / 0.8
• HR ++ glass: 1.1
• Double glazing (Thermopane): 2.8
• Single glass: 5.8

The noise reduction value is dB=36. Regular sound-reducing glass is very thick and therefore does not fit in every type of frame. If you are looking for sound-insulating glass and it also needs to be thin, then there is only one possible solution and that is vacuum glass.

BENGglas vacuum glass is always hardened and therefore injury-safe. With injury-resistant glass, only small pieces of glass will fall down in the event of breakage, which cannot cause serious injury. In addition, this allows the glass to be placed up to the ground.

This value indicates the heat loss at the transition of the construction parts in which the glass is incorporated to the outside of a building. For example, consider your window. This value is shown per running meter at a temperature difference between inside and outside of 1 °K. The lower the PSI value, the less the heat loss.

• Aluminum frame with BENGglas hybrid: 0.035 – 0.04
• Wooden frame with BENGglas : 0.05 -0.09
• Aluminum frame with BENGglas : 0.09

Below you will find the PSI values ​​including BENGglas per type of frame.
The lower the PSI value, the less the heat loss.

• Aluminum frame with BENGglas hybrid: 0.035 – 0.04
• Wooden frame with BENGglas : 0.05 -0.09
• Aluminum frame with BENGglas : 0.09

The LTA value represents the light entry factor. In other words, the extent to which light is guided through the insulating glass. The higher the value, the more light is let through.

Below you will find the LTA value per glass type:

• Single glass: 90%
• HR++ glass: 82%
• Triple glass or HR +++: 74%
• BENGglas : 70-78% (single or double coating)

The G value, or the ZTA value, represents the solar accession factor. In other words, the extent to which heat radiation is blocked. If you want to ensure that it gets less hot inside during the summer, it is best to opt for a double (D.80) coating. Do you want more heat in your home? Then it is best to opt for a single (S1.16) coating. The insulating glass with a double coating has a slightly darker color than with a single coating. The U-value is also lower with a double coating and it therefore insulates better.

Would you like less light in your home? Then a solar control coating on BENGglas offers a solution.

BENGglas has a warranty period of 15 years, a tested lifespan of 25 years and an expected lifespan of 50 years. As an example; traditional insulating glass offers a term of only 10 years.