ENERsign GmbH

ENERsign GmbH is a leading German producer of high-performance windows and doors with than two decades of specialization and experience on the Passive House market. The PHI-certified superinsulated ENERsign®primus product line of window and door combine seamless aesthetics and technical integration with one of the highest thermal performance available on the marketplace.

Our patented ENERsign®primus System is a wood-aluminum window perfectly designed to provide the best possible energy efficiency with minimal sight lines and clean overall aesthetics. 

The ENERsign®door, ENERslide lift+slide and the ENERsky framless oversized windows complete the product offering with exceptional products.

The wall integrated ENERsign®primus aluminum clad wood windows offer a high degree of both thermal and visual comfort from low conductivity native, natural woods. The surrounding slender visual frame profiles create minimal sight lines while the extra deep profile depth provides excellent stability. The frameless window sash design allows for a continuous glass sight line even where fixed and turn-and tilt elements combined.