Fireplace, one-sided energy save.
In the 10X series you can see fireplaces located at an angle of 2.5 meters. The chimney in this series of drawings comes out at the side and under the beam.
See the rest of the 10X HERE:
2 face 101 , 2 face 103 , Middle 104 , Polygon 105 , 3 face Π 106 , 3 face 107 .