Vacuum glass is an extremely thin type of insulating glass in which two glass plates of at least 4 millimeters are separated by a vacuum cavity of at least 0.15 millimeters. The total thickness of the glass package is 8.15 mm. Despite this small thickness, U-values ​​of no less than 0.40 W/m2K are achieved.

To distribute the pressure of the glass over the glass surface and prevent the two glass plates from touching each other, micro spacers are evenly distributed over the entire glass surface. These spacers are located every 40 to 60 mm (depending on the type) and are barely visible from 2-3 meters.

Because the glass plates are hermetically sealed, there is minimal heat or sound transmission and optimal insulation can be provided.

Some important features and benefits of vacuum glass are:

1. Excellent thermal insulation: The absence of air or gas between the layers of glass significantly reduces heat conduction, making vacuum glass one of the most thermally efficient glass products. It keeps heat in in winter and heat out in summer, reducing energy consumption for heating and cooling.
2. Thin and lightweight: Vacuum glass is thinner and lighter than HR++ or triple glass. While HR++ and triple glass are often too thick for older frames, vacuum glass almost always fits in the existing frames. This saves on new window frames, but also on the purchase of new hinges and locks, labor and time. The installation of the glass also takes much less time because it is less labor intensive due to the light weight of the glass compared to, for example, triple glazing.
3. Improved Sound Insulation: Due to its dense construction, vacuum glass can also reduce sound transmission, resulting in a quieter indoor environment. BENGglas reduces 36 dB. In a layered version this increases to 39 dB.
4. Condensation control: As with other insulating glass, vacuum glass helps prevent condensation on the inside of the window. Condensation can always form on the outside, but this is a sign of good insulation.
5. Energy efficiency: The use of BENGglas contributes to reduced energy consumption and lower energy costs. BENGglas also reduces the energy requirement of a home. This allows savings in the number of solar panels or the strength of the heat pump.

The origins of vacuum glass date back to a 1913 German patent, but it took until the mid-20th century for this innovative technology to become a reality. The debut on the commercial market did not take place until 1996, when the product first became available in the Netherlands.

BENGglas has entered the Dutch market since 2020, and its roots can be traced back to Giga-Glas! BV, an international glass wholesaler with three decades of experience. BENGglas vacuum glass has now acquired a prominent position in the insulating glass market. The organization is actively committed to accelerating the energy transition by increasing awareness of the product and charging fair prices.

The lifespan of vacuum glass has been tested and appears to be at least 25 years, while retaining its insulation value.
The glass is expected to last up to 50 years. The warranty for BENGglas is 15 years compared to what is common (10 years).

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 in vacuum glass and the U-value remains at 0.40 for type BENGglas . Even if the vacuum glass is placed at an angle, there is no reduction in the 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 in vacuum glass are required.
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 cap can sometimes be avoided by means of special production techniques.

Where the absorption points are intended to extract moisture extract air If the vacuum caps are missing, the air is extracted from the corners of the vacuum glass.

The combination of both creates a vacuum so that no conduction can occur between them. Without conduction, heat remains inside and cold outside (or vice versa in summer), which ensures the best insulation value.

The number of absorption strips and points can increase as the surface area of ​​the window increases. Therefore, always consult the technical drawings of the relevant model before purchasing. It is important that these strips are neatly concealed behind the glazing beads/putty. Calculate carefully whether you have enough space for this.

Vacuum glass insulates better, but also retains its U-value (insulation 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 a lot greater with other types of insulating glass as they are processed using air or noble gas. These gases escape through the frame over time, causing other insulating glass (for example: HR ++ or Triple glass / HR +++) to lose its original insulation value over the years.

There is still no harmonized standard requiring CE marking that includes vacuum glass. This is also not expected in the short term. Other brands of vacuum glass cannot therefore have a CE marking.

Vacuum glass consists of two slim glass plates, each only 4 mm thick. The glass plates are separated by a high vacuum space of 0.15-0.30 mm. This brings the total thickness of vacuum glass to just 8.15 mm.

BENGglas vacuum glass is available in the glass thicknesses mentioned below. It is important to choose the correct glass thickness based on the total surface area of ​​your window. You can adhere to the following rule:

• 8.15 – 8.3 mm: < 1.8m²
• 10.15 – 10.3 mm: 1.8 – 2.7 m²
• 12.15 – 12.3 mm: > 2.7 m²

There is no additional charge between panes of 8 or 10 mm glass thickness. A small surcharge applies to windows from 12 mm.

To make a fair price comparison between BENGglas and other insulating glass, you must make an overall cost calculation, including taking into account any replacement of window frames or hinges and locks, subsidies and what the investment means for your energy label. , when you switch from single glazing to BENGglas , you do not have to replace your window frames, which can save costs. In addition, your energy label will increase more if you choose BENGglas than if you switch to HR++ glass, for example. Our BENGglas dealers are able to make a fair cost comparison for you, including taking such aspects into account.

ISDE subsidy is available on BENGglas For replacing your glass in the Netherlands, this is €23 per m². 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 second measure (or more). Source: www.rvo.nl . In Belgium (Flanders) this is € 16 per m² for replacing the glass (excl. frames). You can apply for the subsidy via the online counter at vlaanderen.be.