Tested Data:

1.　sound insulation--reduce the noise by 33 dB
2.　air penetrability--less than 0.1m/mh under the atmospheric
　　 pressure sf 10Pa
3.　anti-wind-pressure--more than 3500 Pa
4.　Water penetrability--more than 400 Pa

According to the standards of GB11793.1-89,our products of window is designated as the high performance and advanced(A1 degree).