How about Jinan Zhenfei door and window equipment?

1. Zhenfei door and window equipment adopts broken bridge isolation heat conduction technology and hollow vacuum glass, which has the functions of energy saving, sound insulation and waterproof.

2. Compared with ordinary doors and windows, the heat loss is reduced by 50%, the heating cost is reduced by about 35%, and the sound insulation, water tightness and air tightness all reach the national A 1 window standard.