At present the entire doors and Windows industry is popular system doors and Windows, especially in jiangsu and zhejiang areas, are using system doors and Windows so system doors and Windows with non-system doors and Windows are different what? Let small make up today to explain basic difference is that Windows system and non-system Windows on the thermal insulation performance, low heat conductivity system doors and Windows inside the cavity filling materials, thereby reducing heat insulation cavity in the body cold and hot air convection, heat loss generated by the super heat preservation effect rather than the doors and Windows of the systems, there is no such materials, doors and Windows system has a wide big article insulation, more profile cavity, isotherm structure design, multichannel seal, cavity filling, the K value lower glass doors and Windows do not have all these features are system.