een having a blast building this half-wall with hydronic tubing.  It isn’t L-shaped, I just couldn’t fit it into one picture.  Since the floor is much higher in this small portion of the downstairs of the barn, and I don’t have room to add heat to the floor, I had to think creatively.  The wall will be filled with a mixture of clay, sand and fiber, which will act as the thermal mass for the heat tubing.