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</html><thumbnail_url/><thumbnail_width/><thumbnail_height/><description>WAT ZIJN DE MOGELIJKHEIDEN? De BENG-regels hebben nogal wat stof doen opwaaien in ventilatieland. Aan de ene kant lijkt het alsof gebalanceerd centraal ventileren met wtw nu de maatstaf is geworden om aan de eisen te voldoen. Aan de andere kant lijkt ook decentraal ventileren opgang te maken. IZ sprak met fabrikant Siegenia, opleider IW [&hellip;]</description></oembed>
