We racked 2 3900 brocade switches in a rack with 3 Sun Netra's. After about 10 hours of having the switches powered up the closest Netra crashed due to Enviornmental issues. I have now decided that I will move these 2 brocade space heaters and put them in a less occupied rack. Does anyone know how far apart the 2 switches need to be mounted from each other. Meaning how much space in between the 2 switches do I need to give for proper ventallation.