If you are interested in the architectural engineering, there is one part of archtectual  engineering  that the michenical students have more advatege than the archtectural stuendts. It is a building sicence or building

thechnology part. In Korea, it is called architectural environmental engineering. It handles mechanical part which include HVAC. In USA, there is 70% graduate stuendts of the building system part in  civil or archtectural department has mechnical undergraduated basement.