1 : Air filter (s) 
2 : Indoor Coil 
3 : Return Air To Indoor Unit 
4 : Supply Air From Indoor Unit 
5 : Electrical Box 
6 : Inter-connecting refrigerant piping lines and electrical cables  
 between outdoor and indoor units. 
7 : Condensate Drain hose 
8 : Wired control ( Standard ) 
9 : Display & Receiver Panel for optional wireless remote control