The advantage of the INVISA system is its installation, which does not require screws or interfering in the window frame in any way.

The Invisa blind system is the optimal aesthetic and technical solution for giving your home a sophisticated look. 

The system, with its build-in box and guide rails sunken into the soffit, is invisible when the blinds are raised.

Concealed box

Styrofoam with groove – soffit

Hidden guide rails

Due to the specificity of architecture and construction in the present time, the implementation of the built-in box is always adapted to the situation of the building. The aluminium box in the shape of the sink is closed off on one side, ensuring a stable load on the façade system.

With the development of INVISA, we took a step forward in increasing energy efficiency, since the system provides the optimal solution to heat loss.

The guide rails are submerged in the soffit and covered with façade plaster.

Slats

You can choose from different forms of slats, which can be inserted into all TEHROL external venetian blind systems.

C slat

  • Basic slat shape. 
  • The slats are made of aluminium, permanently resistant to rust.
  • Tested for strong wind shocks.
  • Easy cleaning of slats.
  • A wide selection of colour shades.

T slat

  • Basic slat shape.
  • The slats are made of aluminium, permanently resistant to rust.
  • Tested for strong wind shocks.
  • A wide selection of colour shades.

S deluxe slat

  • An updated, sophisticated and more elegant design.
  • The shape of the slats achieves optimal sunray deflection.
  • The inserted seal allows for better sealing, resulting in better resistance to wind conditions.
  • The slats are made of aluminium, permanently resistant to rust.
  • Easy cleaning of slats.

Z slat

  • An updated, sophisticated and more elegant design.
  • The shape of the slats achieves optimal sunray deflection.
  • The inserted seal allows for better sealing, resulting in better resistance to wind conditions.
  • The slats are made of aluminium, permanently resistant to rust.

Slats

You can choose from different forms of slats, which can be inserted into all TEHROL external venetian blind systems.

C slat

  • Basic slat shape. 
  • The slats are made of aluminium, permanently resistant to rust.
  • Tested for strong wind shocks.
  • Easy cleaning of slats.
  • A wide selection of colour shades.

T slat

  • Basic slat shape.
  • The slats are made of aluminium, permanently resistant to rust.
  • Tested for strong wind shocks.
  • A wide selection of colour shades.

S deluxe slat

  • An updated, sophisticated and more elegant design.
  • The shape of the slats achieves optimal sunray deflection.
  • The inserted seal allows for better sealing, resulting in better resistance to wind conditions.
  • The slats are made of aluminium, permanently resistant to rust.
  • Easy cleaning of slats.

Z slat

  • An updated, sophisticated and more elegant design.
  • The shape of the slats achieves optimal sunray deflection.
  • The inserted seal allows for better sealing, resulting in better resistance to wind conditions.
  • The slats are made of aluminium, permanently resistant to rust.

Colours

You can customize the colour of the Invisa blind system to suit your facility. All the guide rails the slats travel along, as well as the box, come in any colour from the RAL colour scale, according to your preferences and requirements.

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Integrated insect screen

The integrated insect screen can be installed in all types of external venetian blind systems, or a SCREEN fabric can be inserted instead. 

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Control

The blinds can be operated manually or by an electric drive. The TEHROL system enables the fully automatic control of external blinds.

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External venetian blinds, when lowered, prevent the heating of the glass and thus the direct entry of heat into the room. In winter, they work as an additional heat insulator to help you save on heating.

Aluminium slats help improve sound insulation. This has two advantages. Firstly, there is less noise coming from the outside. This will help you go to bed in the evenings or let you sleep in, even with noisy neighbours. Secondly, of course, the insulation works both ways. Closing the external venetian blinds reduces the possibility of neighbours or passers-by listening in on your private conversations.

Enjoy the privacy of your apartment.

A fully lowered venetian blind acts as an effective protection against intruders. It is very important that any intruders are deterred before even attempting a break-in.

All the components exposed to external weather conditions are made of aluminium material resistant to external influences.

 

Thermal insulation

External venetian blinds, when lowered, prevent the heating of the glass and thus the direct entry of heat into the room. In winter, they work as an additional heat insulator to help you save on heating.

Sound insulation

Aluminium slats help improve sound insulation. This has two advantages. Firstly, there is less noise coming from the outside. This will help you go to bed in the evenings or let you sleep in, even with noisy neighbours. Secondly, of course, the insulation works both ways. Closing the external venetian blinds reduces the possibility of neighbours or passers-by listening in on your private conversations.

Privacy protection

Enjoy the privacy of your apartment.

Intruder protection

A fully lowered venetian blind acts as an effective protection against intruders. It is very important that any intruders are deterred before even attempting a break-in.

Aluminium

All the components exposed to external weather conditions are made of aluminium material resistant to external influences.