Most air purifiers are awkwardly-shaped appliances that are too big to hide and are often relegated to a corner and written off as eyesores. Not Jae-Han Song's 'Window' air purifier.

The 'Window' air purifier looks just like a window, with transparent glass surrounded by a white and black frame. When the air quality in the room is low, the 'Window' air purifier gets cloudy. To start the purification process, just slide the 'Window' open.

To see how Jae-Han Song's 'Window' air purifier works, click through the images in the gallery.