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AAC WORLDWIDE %u2022 2.2025 PROJECTS 99Xella Deutschland GmbHD%u00fcsseldorfer Landstra%u00dfe 39547259 Duisburg, Germanywww.xella.dewater from all roofs and terraces and a grey water reuse system. A project with a photovoltaic system, controlled ventilation and a high level of comfort thanks to the thermal and acoustic insulation characteristics of the Ytong, whose envelope %u201cas well as all the interior partition walls offer great thermal properties, something highly valued in our hot climate,%u201d says Salavert.Further project in ValenciaA project underway for future Passivhaus certification is being led in Valencia by the Lasar architecture studio, which was recently visited by managers from Xella North West Europe. A 250 m2 house designed under bioclimatic criteria and passive measures for solar and temperature control, with overhangs that will allow optimal use of solar energy in winter and summer. The Ytong blocks and the exterior insulation of Multipor guarantee a high degree of thermal and acoustic insulation reducing the environmental impact of the project, offering its owners a comfortable and healthy home free of toxic materials and VOC. %u25cfPassivhaus CertificationThe Passivhaus standard is the most demanding worldwide in energy efficiency. It includes five basic principles that refer to insulation, airtightness, exterior carpentry, ventilation and an envelope with no thermal bridges. It is an international standard that is valid for all climate zones and differentiates construction solutions according to each of them. In all cases, the criteria for the certification affect the energy demand of the building and its airtightness, so the intrinsic characteristics of Autoclaved Aerated Concrete, meeting these demands, make it an optimal material for this type of project. Ytong blocks are tested and guaranteed airtight, but the airtightness of the whole depends on other factors, which is why Xella places special emphasis on correct execution, providing training both in professional schools and on site in order to obtain the full performance offered by Ytong. Xella continues to develop efficient, sustainable, and high-quality building solutions to meet the challenges of our time.