Complex sentence: These openings are for Air Conditioning, Program Control, and Electrical Switching, as well as the Water Softener, which is immediately south of the Air Conditioner Room and is under the South Portico.
Split into simpler sentences: These openings are for Air Conditioning, Program Control, and Electrical Switching. Additionally, the Water Softener, which is immediately south of the Air Conditioner Room and is under the South Portico.