Our system is a passive ultra-low-energy consumption ICF formwork. When incorporated our ICFs into passive house building, indoor air temperature and humidity will be kept at a constant state, therefore, this system will reduce or even eliminate the use of fossil fuels. In Northern China winter time, coal or air conditioners are avoided, while in north/south China summer time, air conditioner units are no longer needed either. 

    The advantage of ICFs lies in that double layers of EPS functioned as thermal insulation will render indoor temperature at around 24 ℃ all year round， which will significantly save energy consumption over 92%.