Kömmerling InVitra achieves passive house standard
The profine system Kömmerling InVitra has now achieved passive house suitability as defined under ift guideline WA-15/2. The Uf value of 0.96 W/(m²K) was measured on a variant featuring a prefoamed “proEnergyTec” frame. As in the standard design, the sash is fitted with a steel reinforcement. This means that the corresponding passive house windows – including colour elements – can be manufactured in the standard production process.