ENERGATE® - Ludwig Haeussler GmbH For generations our family-owned company, founded in 1919, has focussed on the production of sustainable, energy saving, high-quality windows and doors at our own factory in Speyer, Germany. We combine cutting-edge technology with specifically developed patents. Durability, comfort, safety, light-related design and a highly-efficient energy balance are values which are important to us. Energy is a resource which is becoming more and more valuable. And that is the reason why we have decided to concentrate on the development and production of high-insulating and, therefore, energy-efficient windows and doors. In order to protect the first class production of our windows and doors, we only use high-quality and robust components. Quality marks and certified components guarantee tested quality. ENERGATE® high insulating windows enable a modern, transparent, light flooded architecture and guarantee greater living comfort. The development of especially slimmer profiles and object specific designs as well as a new thermotechnic value dimension opens up new possibilities of related building for architects. As a specialist for energy-efficient system solutions, we also supply and assemble windows and doors further afield. We deliver our products worldwide and have already realised projects in Denmark, Norway, Belgium, Ireland, USA and U.A.E. Furthermore, we have numerous worldwide cooperation partners. Our focus is on the construction of energy-efficient and high-insulating windows and doors. Products lines ENERGATE® 834 [+] plastic passive house window ENERGATE® 1042 [+] wood passive house window ENERGATE® 1202 [+] wood-aluminium passive house window Our products are certified by accredited testing facilities (IFT-Rosenheim, National Fenestration Rating, Council, SINTEF, Passive House Institute Darmstadt PHI, and others) Haeussler ENERGATE® windows and doors are used for passive houses, low-energy houses, Green Building projects, CO2-neutral construction projects, eco houses, energy-efficient houses, comfort houses or the modernization of old buildings.