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HIRT kinetics HF-75

HIRT kinetics HF 75 is the little sister of HIRT kinetics HF 90. This window system that is flush with the external façade is available in two variants: opening upwards or downwards.

Like all HIRT kinetics, HF 75 is balanced with counterweights. Due to its low weight, HF 75 can be easily moved by hand. An electric version is also available. A drop stop ensures a high degree of safety.

Technical data


Max. Height
4 m
Max. Width
4 m
Max. Surface Area
6 m2
Max. Weight
300 kg
Max. Glass Thickness
61 mm
Installation Depth Mounting Frame
Installation Depth Sash
75 mm
Opening Direction

Security Options

Burglary protection glass according to DIN EN 356
Burglary protection resistance classes according to DIN EN 1627
RC 3
Bullet proof glass according to EN 1063



HIRT kinetics HF saves space and delivers a more elegant and practical solution than casement windows. When retracted, the large open space allows for much more air and light to enter the room than with a conventional window. Moreover, the vertical opening mechanism allows you to make full use of the available space.


We built on the known advantages of vertical sliding mechanisms by adding new features made possible by modern technology. Current structural engineering regulations with regard to sound and heat insulation are met, and living comfort is guaranteed. The slim profiles of the sash and the frame, with integrated mechanics please even the most demanding design enthusiasts.


HIRT kinetics HF is a patented lifting and descending window system that has been successfully installed for years. What makes this system so attractive is that the window panel can vertically slide behind a fixed panel, offering a lot of freedom in terms of its design and use. Furthermore, this system allows for efficient room ventilation and provides superior thermal insulation, which contributes to lower energy consumption.

HIRT kinetics HF is becoming increasingly popular in a wide range of buildings. Schools, restaurants, offices and private home owners enjoy full use of their space and freedoms that casement windows lack thanks to the vertical opening principle of the HF solution.


Panels up to a maximum width of 4 m/13 ft and height of 2,5 m/8 ft (max. 64 sq ft) with a mass of approx. 300 kg/660 lb are possible with the standard version. Larger dimensions necessitate modifications to panels, runners, suspensions, etc. Custom solutions are possible, pending engineering review.


The window panel is suspended from counterweights by means of chains. The high-quality ball bearings move in the guide slot in perfect silence. The runners with integrated mechanical components are mounted on the frame profile and directly connect to the panel to save space. This allows for an extremely slim profile. The classy aluminum cladding conceals the mechanics, suspension and counterweights.

HIRT kinetics HF 75 References

HIRT kinetics HF 75-up is mainly used for room heights of more than 3m. The opening sash can be installed flush with the floor or on a parapet.

HIRT kinetics HF 75-down is the vertical sliding window variant that opens downwards. The system serves as an opening element across a maximum width of 4m. The fixed lower panel also provides fall protection.