This is a convenient window design, called Two-Face window, it can be rotated to 360-degrees, making it safe and easy to clean. If you place small flower pots on one side, you can easily expose your plants under the sun or safe it from the rain, simply by rotating the window. Cleaning the window on both sides is no longer be a problem, even when you live in a tall apartment building.
Designers : Kim June Kyoung and Do Yong Gu
.simply nice.
Rotary window does not allow good sealing. Not suitable for cold places. If you want to rotate the window sills must be empty. It is not practical.