The term “passive building” is related to a wide range of buildings in which the usage of natural elements is optimized, such as: internal heat, external temperatures, solar heat, thermal mass, pressure difference between in- and outside. Smart technologies making use of these sources and mechanisms can help reduce the need for active heating, cooling and ventilation. The focus of this module is on building techniques that reduce the space heat demand by high isolation levels to a very low minimum. The technology is initially developed for houses and schools, but can be applied for other functions as well.