Products, which had been developed for the Passivhaus standard were further commercialised during and following the European Union sponsored CEPHEUS project, which proved the concept in five European countries in the winter of 2000–2001.
Proizvodi razvijeni za Passivhaus standard su i dalje komercijalizirani tijekom i nakon projekta Europske unije CEPHEUS, koji je potvrdio koncept u vrijeme zime 2000. na 2001. godinu.