Kömmerling 76 MD Zero is an architectural hit in Spain. The hidden sash design makes the window look like fixed glazing from the outside, even if it opens. This provides clean facade lines and increases the light opening area compared to standard windows.
The system is based on the highly efficient 76 mm platform with central sealing, combining minimalist design with top thermal insulation performance. Ideal for projects in modern and high-tech styles.
Technical Specifications
Details
A designer "hidden sash" system. From the outside, the window looks like solid glass without extra frames. It lets maximum light into your home and is ideal for modern minimalist villas.
System structural parameters:
- Design concept: Hidden sash. From the outside, the sash is completely covered by the frame, creating a visual effect of a fixed window.
- Light opening: Increased glazing area due to minimal visible profile width.
- Installation depth: 76 mm.
- Sealing system: 3 circuits (central sealing included).
- Material: High-tech PVC with matte or glossy finish.
Glazing and infill options:
- Maximum infill thickness: up to 50 mm.
- Features: Glazing unit is bonded using STV technology (dry bonding), which prevents sash sagging.
Maximum construction dimensions:
- Maximum sash height: up to 2400 mm.
- Maximum sash width: up to 1400 mm.
Certified characteristics:
- Profile thermal insulation (Uf): 1.2 W/m²K.
- Water tightness: 9A.
- Air permeability: Class 4.
- Sound insulation: up to 48 dB.
- Wind resistance: Up to C5.
- Burglar resistance: RC2.
Minimalism and purity
Hidden sash design

Spaciousness
Panoramic view without borders

Technology
Premium airtightness
Kömmerling 76 MD Zero
A designer "hidden sash" system. From the outside, the window looks like solid glass without extra frames. It lets maximum light into your home and is ideal for modern minimalist villas.
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Financing Options
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More detailsDon't Forget to Add
Additional elements and accessories that will make your home even more comfortable
Mosquito Nets
Handles and Locking Elements
Lamination
Decorative Elements
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FAQs
Frequently Asked Questions about Kömmerling 76 MD Zero
What is a hidden sash and what is its purpose?
In the 76 MD Zero system, the sash is completely covered by the frame from the outside. From the street, the window looks like fixed glazing, even if it opens. This allows architects to create facades with clean, symmetrical lines where no difference is visible between opening and fixed windows.
How much more light does the Zero system provide compared to regular windows?
Because the sash profile is "hidden," the visible plastic part is reduced to a minimum. This increases the transparent glazing area by approximately 15-20%. Your home is filled with natural light, which is especially valuable for small rooms or spaces with sea or garden views.
Is this system suitable for modern minimalist architecture?
This is the main purpose of creating 76 MD Zero. It perfectly combines with High-tech and Minimalist styles. The narrow, straight profile lines emphasize the modern character of the building. It is often chosen for premium villas and apartments where design is a priority along with functionality.
Does thermal insulation suffer due to such an unusual design?
Not at all. Zero is based on the proven 6-chamber 76 MD platform with three sealing circuits. The profile heat transfer coefficient is around 1.0 W/m²K. You get an ultra-modern appearance without any compromises on heat or cold protection.
Is it easy to clean such windows if the sash is hidden?
Cleaning 76 MD Zero windows is no different from standard systems. In the open position, all surfaces are accessible for cleaning. Moreover, the absence of protruding sash parts outside reduces the number of places where street dust and dirt can accumulate, making the facade neater.
What hardware can be used in a hidden sash system?
The system is fully compatible with modern hardware systems, including fully concealed hinges. In this combination, the window looks maximally aesthetic both from outside and inside — there are no protruding elements on the frame, only an elegant handle.


















