I have just finish the setup the fog sysyem in my greenhouse, Orchids (mainly Stanhopeinae) and Amorphophallus.

The Fog System uses very high water pressure and specifically designed nozzles placed at precise intervals to give the optimum humidity level, i work with 80%.
The entire system including high pressure pump, plastic tubing and 6 steel nozzles with ruby, my greenhouse is about 5m X 2m and 3m tall.
The system is automated by an hygrostat that manage the pump, when the humidity level is low the pump work wit 30S on an 60S.
Seems to be in Borneo!!!!!
look the video here: