The concept behind a passive house works only with a refined thermal insulation that limits the annual heating needs to 15 kWh per square metre of living space. This allows a building to be heated alone from passive energy sources without the need for a separate heating system. One of the most important components here is the window system. The slender profile sight lines presented by TROCAL 76 centre seal not only allow a modern design with large glazed areas, but also increase solar heat gains.
The passive house institute ift in Rosenheim calculates the thermal insulation value for the PVC-U window frame in accordance with DIN EN ISO 10077-2. The condition here is a value Uf less than 0.96 W/(m²K). Ultimately, though, it is not solely the Uf value that decides the passive house suitability of a window, but also the Uw value, i.e. the thermal insulation values for the whole window. This must be ≤ 0.8 W/(m²K).
Thanks to the two upgrade technologies proEnergyTec and AluClip Pro, the TROCAL 76 centre seal system is available in no fewer than two versions that fulfil the passive house requirements in ift guideline WA-15/2.
In the first variant, the reinforcing chamber in the outer frame is foam filled with the thermal insulation technology proEnergyTec. This helps to achieve the passive house compatible Uf value of 0.95 W/(m²K). Here you can design the PVC-U profiles just as you wish with our DecoStyle laminate colour range or the innovative finishing technology proCoverTec.
The second variant, fitted with the AluClip Pro aluminium cover gives you the best of both worlds: PVC-U and aluminium. AluClip Pro takes over a static function, making steel unnecessary in the sash. Thanks to proEnergyTec technology, the reinforcing chambers in the sash and outer frame can be foam-filled – achieving a Uf value of 0.82 W(m²K).
Our greenline principle: energy efficient window systems, lead free stabilisers in virgin material, and intelligent recycling concepts provide that extra sustainability.