什么是节能门窗？
What are energy saving doors and windows?
节能门窗通常是与普通门窗比较后更节省能源，因此被称为节能门窗，也被称为低能耗门窗。通俗来说，由于节能门窗的保温性能好，可以节省人们的暖气或者空调的使用率，降低其他能源的使用，所以被称为节能。其中保温则是节能门窗的性能之一，除此之外，节能门窗还具有很多优点，比如：强度，气密性，美观度，使用寿命等等都要比普通门窗持久。
Energy saving doors and windows are usually more energy-saving than ordinary doors and windows, so they are called energy-saving doors and windows, also known as low-energy doors and windows. Generally speaking, due to the good thermal insulation performance of energy-saving doors and windows, it can save people's heating or air-conditioning utilization rate and reduce the use of other energy, so it is called energy-saving. Thermal insulation is one of the performance of energy-saving doors and windows. In addition, energy-saving doors and windows also have many advantages, such as: strength, air tightness, beauty, service life, etc. are longer than ordinary doors and windows.