Trombe Walls

I have decided to incorporate trombe walls into my design, which will be placed at the rear of the classrooms with high windows so that the sun is angled toward them. It was decided that if placed on the exterior of the walls, the glazing would cause the building to loose their rugged aesthetic through the rammed earth and unpolished concrete. The trombe walls will add significant passive heating during the whole day through the thermal mass of the rammed earth, and will keep heating into the evening and night for use of the community. Also, if the temp is kept higher through the night, it will reduce the heating costs the next morning.