Smart ventilation without replacing window frames
The GlasVent 16 ZR AK is Duco’s latest innovation and matches perfectly with BENGglas. This way, you effortlessly improve your ventilation, insulation, and soundproofing – without hassle with new window frames.
Curious about what BENGglas and Duco grilles can do for your project? Duco's specialists provide you with targeted advice and a clear performance calculation.
Powerful ventilation, even in high-rise buildings
Duco’s latest innovation combines ventilation, sound damping, and water and wind tightness in one smart design. Ideal for high-rise buildings and the preservation of existing window frames. Suitable for glass thicknesses from 8* to 56 mm and easy to install above the glass (deduction 100 mm) or as a calf grille.
* With 8 mm glass, use a 16 mm glass channel with a putty-replacing sealant such as Renoseal, Monuseal, or Dow Corning. From 10 mm, glazing rubber is sufficient.
Technical specifications
U-value: 2.09
Airtightness class: Class 3
Leakage rate 50 Pa (closed position): 0.790 m³/h*m
Water tightness (closed position): 600 Pa
Water tightness (open position): 50 Pa
Glass deduction: 100 mm
Grille height (when placing glass): 116 mm
Grille height (when placing transom): 140 mm
Glass groove: 16 / 18 / 26 / 30 / 34 / 38 / 42 / 46 / 50 / 54 / 58 / 62 mm
Glass thickness: 8* / 10 / 12 / 20 / 24 / 28 / 32 / 36 / 40 / 44 / 48 / 52 / 56 mm
*Glass thickness of 8 mm is possible in combination with a glass groove of 16 mm. In this case, a putty-replacing sealant, putty sealant or sealant such as Renoseal, Monuseal, and Dow Corning is used. Glass thicknesses from 10 mm are applicable with glazing rubber.
Meet Duco
Where silence and fresh air come together
Frequently asked questions
Why should I choose BENGglas?
BENGglas is not ordinary glass – it is a revolutionary solution for sustainable and future-proof building. Compared to standard insulation glass, BENGglas offers unique advantages that directly improve both your home and the climate.
- Superior insulation: with a U-value starting from 0.35 W/m²K, BENGglas is twice as effective as triple glazing (0.70) and even three times better than double glazing (1.10). This means significant energy savings and lower heating costs.
- Long lifespan: while traditional glass lasts an average of 25 years, BENGglas lasts up to 50 years. Produce once, less CO₂, and half a century of benefits!
- Sustainable and environmentally friendly: thanks to less material use (30% less glass than triple glazing), BENGglas saves thousands of tons of CO₂ annually. This way, you actively contribute to a cleaner planet.
- Light and thin: at only 8.3 mm thick, BENGglas fits in almost any existing frame and allows for lighter hardware, making construction sustainable and efficient.
- A true climate hero: if all of the Netherlands switches to BENGglas, we can save up to 4.1 megatons of CO₂ annually — that's equivalent to 170,000 car trips from Amsterdam to Paris! Moreover, the production of BENGglas alone results in 24,000 tons less CO₂ emissions per year.
- A smart investment in the future: less energy consumption, less maintenance, and a longer lifespan make BENGglas a choice that benefits you for years – for yourself and for future generations.
In short: with BENGglas you choose maximum energy efficiency, sustainability, and a smart investment in the future. Make a difference, for your home and for our planet.
How do I request a quote?
Under the heading ‘Dealers’, you will find an overview of all BENGglas dealers near you. Once you have contacted a dealer, they will prepare a quote for you. This quote includes both the glass and the necessary installation. If desired, additional work, such as painting, can also be included. This way, our dealers always offer a complete total solution.
All BENGglas dealers have sample panes, so you can view the glass and make an informed choice. Additionally, you are warmly welcome by appointment in our showroom to personally experience the possibilities.
Is there no dealer near you? Then ask your local glazier to contact BENGglas via info@bengproducts.nl.
How much subsidy do I get for BENGglas in the Netherlands?
Good news! Thanks to the Investment Subsidy for Sustainable Energy and Energy Saving (ISDE), you can receive a nice reimbursement if you make your home more sustainable with BENG glass:
- € 25 per m² if you only replace the glass with BENG glass (report code: KA18780)
- € 111 per m² if you also renew 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 will be doubled!
Are you unsure if your home is a national monument? Check it quickly on RVO.nl.
Are you an entrepreneur and want to make your business premises more sustainable?
Then the Energy Investment Allowance (EIA) is something for you! With this, you can receive up to € 300 per m² in tax benefits. Note: the investment must be at least € 2,500. Don't forget to apply for the subsidy within three months after installation via the eLoket of RVO.nl.
What glass thickness do I need?
BENGglas is available in various thicknesses, so we always have the perfect match for your windows. This prevents distortion, warping, and other issues.
The larger the glass, the thicker the build. The glass thickness is determined based on the surface area of a single pane:
- 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 BENGglas too thin for your frames? No problem!
BENGglas is ultra-thin, but if your frames are wider than 16.3 mm, we can also thicken (BENGglas Hybrid) or laminate the glass. This way, it fits perfectly into wider profiles without needing to replace your frames.
Not sure which thickness is best for your windows? No stress, we are happy to help you with personalized advice that fully matches your situation!
What are the minimum and maximum dimensions of BENGglas?
The smallest standard size of BENGglas 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 BENGglas stands out.