Product Description Pvc Windows & upvc windows 1. Main Components of Product 1.1 Profile system HSP70: Newest Design from 2004 according to European standard and advanced technology, made in China, white, 5-chamber and 3-sealing. 1.2 Glass system: 26mm total thickness (5mm + 16A (Ar. ) + 5mm Low-E) Glass from Lisec Shanghai, a 100% manufactory from Lisec Austria 1.3 Hardware system: Made in Austria from MACO or made in Germany from HAUTAU 2. Performance index of window 2.1 Acoustical insulation: 36 dB 2.2 K (U)-value of window: 1.80 W/ m2. K 2.3 Wind resistance: 5000 pa 2.4 Air permeability: 0.1 m 3 / h. M 2.5 Watertightness: 500 pa 3. Advantages of ZEHAO WINDOWS 3.1 Economize on energy 3.2 Safety 3.3 Protection against dust 3.4 Protection against noise 3.5 Protection against slope rain 3.6 The Largest opening space with 180 angle 3.7 Available in any size and color you need 3.8 European Standard 3.9 Bring you peaceful and comfortable living condition ... In compare with sliding windows, the construction and material of this new windows has following clear advantages: 1. Economise on energy: Under the same condition this window can reduce at lest 30% energy usage. 2. Safety: The construction of new window reaches a new level of security for windows. 3. Protection against dust: The new window is very airtight by close. But even by tilt it can protect against dust from window sill. 4. Protection against noise: The new window guarantees a effect protection against noise from outside. 5. Protection against slope rain: Even by tilt there is no chance for slope rain to get in to window. Today buildings require already good windows not only because of comfort but also because of economy. Turn-tilt windows have surely good chance to grow rapidly for markets of many countries.