And what if the fireplace is placed in the corner near the cooking area? There, it would also take up less (wall) space and you would feel the warmth on the sofa, but not as intensely. You could also move the chimney to the corner of the hallway, where it would be less obtrusive than in its current location. Btw. Is the door opening direction INTO the living room correctly depicted? For the guest WC, I would consider having the door open INTO the hallway, with regard to accessibility in the guest WC. If someone were to fall inside the WC, they would lie in front of the door, and you would have difficulty getting to them inside the room.