Moving on from conceptual model 3, the final model is further improve and implement. Looking from the exterior, the house is very enclose, in order to allow sufficient natural ventilationa nd daylighting, the opening in the interior is maximise. Airwell is added to act as an important element to improve that situation. Louvres are also used to replace the planes to remain the 2D look visually and yet give out a sense of lightweightedness. Height of the roof is played so that the 3D spatial quality from the inside can be improved.