passive house, which is an ultra-low energy consumption house. Its energy is obtained by itself, such as solar energy, geothermal energy, human body temperature.  It relies very little on external supply. Therefore, it is called a passive house.

It is made with multiple double silver low-e glass with argon space to get very good U value and SC value. 

The advantage of passive room:

1, Comfort:  The passive room maintains a pleasant temperature and humidit.

2, Sustainability: Passive houses require very low energy consumption, which helps reduce the consumption of natural gas and other resources.

3, Innovation: Passive houses are a modern building standard that opens up new perspectives for architects and engineers.

With the very good performace low-e insulated glass and aluminum frame, we get a good U value of the window  system:

We have gained China the certificate of passive house window glass.