Why are system doors and windows more expensive than ordinary doors and windows? You’ll understand after reading this
Building energy efficiency standards are getting higher and higher, and you will find more aluminum alloy doors and windows that do not meet energy efficiency standards. Why? Because you may use non-system doors and windows. Only good system doors and windows can meet higher energy-saving requirements. Of course, there are still many people who don’t know the difference between system doors and windows and non-system doors and windows. Today, the aluminum alloy door and window industry information editor will [...]