Or at least, at first glance it may not seem so – but in fact the concealed frame is exactly what it sounds like: a frame. The difference is that the frame is filled in, so it blends completely into the wall once installed.
The frame is fitted with concealed hinges, and since neither the hinges, frame nor architraves are visible, the result is modern and minimalist. This clean-lined design is perfect for private homes and commercial settings alike. 

For an even more minimalist solution, you can combine this with interior doors without architraves or create an exclusive look with floor-to-ceiling interior doors. If you would rather have a flexible solution in a modern home, sliding doors can be a good alternative.