My heating unit mounted on the wall. 3.5GHash @ 1700W
You need to acquire some cable management skills
F the cable managemnt..... start hashing, lower clocks, keep hashing for long time.
Better cable management is better airflow is better cooling. Ever tried to wire up a whole rack full of servers? You learn real quick about cable management, and once you get into the habit of it it becomes second nature and easy to do.