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Systems to fulfill the air quality in the Roman Art National Museum, Mérida, Spain: First clue solution

 

Past post solution:  In fig. 1, on the top of the glass wall, you can see something like an open window, isn´t it? It is not a window :( . Facade is composed by structural bricks walls. Between two structural walls there are two "open eyes": one to introduce outdoor air and one to expel indoor air. On the back of the eyes there are two air ducts to conduct the air. Machines are placed on inside; where? Two clues are given in Figure 2, please check it and wait next post :)

Fig. 1. "Open eyes" placed on the top of the glass wall

Fig.2. Indoor view of the main facade