External casement windows in the end how to open the appropriate size? Professional designers tell you!
Often people come to ask such a question: open window fan should open how big? Is there any design specification, is there any national regulation ah? How to calculate the strength of the window?There are many failures in window design, two common ones: windows that are too small and windows that are too big. Said are windows open fan: open fan is too small, the result is poor ventilation, neither energy-saving nor suitable for living; open fan is too [...]