Simulating trombe wall

Actually i’ve sent some messagas,but there was no answer.
The problem is that i have no any pattern for creating trombe wall.i created two Breps .one is a room and another is a sunspace or trombe wall.there are two exterior walls which are it is possible that the radiation reach the room’s wall when the sunspace wall is there? Do i consider the sunspace’s wall as an air wall?i want to make these two walls as one object which is not (846.0 KB)
I wish any one could help me