 • Since the Trombe wall is consolidated in one building element-only the south-facing facade-its impact on the overall building design is limited when compared to roof ponds or direct-gain systems.• Visual access to the outside is lost in the full-height Trombe walls unless the system is combined with a direct-gain system or window which allows to visual connection between indoors and outdoors.• Wall hangings or other type of coverings are not allowed on Trombe walls not to block the radiation emitted from the interior surface of the wall at night.