With low heat-conduct property,the heat insulation of plastic is 1250tmes better than aluminum.Esecially with good air-seaing property,even though it is dozens of degree below zero outside door,it is another warm world indoors.

• 塑料的导热系数低隔热效果比铝材优1250倍，加上有良好气密性，在寒冷地区尽管室外零下几十度，屋外却是另一个世界。