产品的性能/价格比：
Product performance / price ratio:
铝合金门窗的性能/价格比高于塑钢门窗。国外的铝合金门窗价格是塑钢门窗的1.5倍，即塑钢门窗价格比铝门窗便宜33%.然而，我国的情况却正相反。钢制闸门 钢坝 保定轻钢别墅 保定平面设计培训 保定室内设计培训 保定办公家具 保定空调维修一般市面上，单玻璃塑钢门窗比铝合金门窗价格高25-33%；中空双玻璃塑钢门窗比铝窗价格高36-44%，当然，这二种类型的塑钢门窗比铝合金门窗的保温性能要好，但是其它性能塑钢门窗却不如铝合金门窗好。中空双玻铝合金门窗比单玻塑钢门窗的价格高约25%左右，然而，前者的保温和隔声及其它性能都好于后者，对于同类结构形式的内平开窗，在铝合金窗隔热型材中空玻璃的保温性能指标（K=2.8）达到塑钢门窗中空双玻窗水平（K=2.7）的情况下，后者的价格还比前者高约24%；然而前者的高强度、高性能、优良的耐腐蚀性（喷涂漆）和装饰效果（金属质感和非金属质感等各种颜色且框、窗型框可室内、外二种色彩）、长久的使用寿命等综合性能远远好于后者。
The performance / price ratio of aluminum alloy doors and windows is higher than that of plastic steel doors and windows. The price of aluminum alloy doors and windows in foreign countries is 1.5 times of that of plastic steel doors and windows, that is, the price of plastic steel doors and windows is 33% cheaper than that of aluminum doors and windows. In general, the price of single glass plastic steel doors and windows is 25-33% higher than that of aluminum alloy doors and windows; The price of hollow double glass plastic steel doors and windows is 36-44% higher than that of aluminum windows. Of course, the thermal insulation performance of these two types of plastic steel doors and windows is better than that of aluminum alloy doors and windows, but the other performance of plastic steel doors and windows is not as good as that of aluminum alloy doors and windows. The price of hollow double glass aluminum alloy doors and windows is about 25% higher than that of single glass plastic steel doors and windows. However, the thermal insulation, sound insulation and other properties of the former are better than those of the latter. For the same type of internal casement windows, when the thermal insulation performance index of aluminum alloy window insulating profile hollow glass (k = 2.8) reaches the level of plastic steel doors and windows hollow double glass (k = 2.7), the thermal insulation performance index of aluminum alloy window insulating profile hollow glass (k = 2.8) is better than that of plastic steel doors and windows hollow double glass (k = 2, The price of the latter is about 24% higher than that of the former; However, the former's high strength, high performance, excellent corrosion resistance (spray paint) and decorative effect (metal texture and non-metal texture and other colors, and the frame and window frame can be indoor and outdoor two colors), long service life and other comprehensive performance are far better than the latter.