The HP 850 system was the first born of the HPSystem series. Based on an innovative idea, that for a long time represented on of the few available thermal break systems on the market, which by the way used perimetrical accessories ; an idea which was copied afterwards by other manufactures.

Dimensions were important, and after an important projecting phase this system was a reference point due to it’s mechanical resistance characteristics.

 

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The noticeable mechanical resistance guaranteed by the frame, and window dimensions, were made possible thanks to the placement of 4 angles on each corner.

The above along with the use of perimetrical accessories, and the possibility to place special accessories avoiding any forced entrance issues, has allowed the HP850 system to obtain the class 3 in the forced entrance trail test.