What are the proper ventilation requirements for setting up the Z420 Workstation?

Provide at least 15.24 cm (6 inches) of clearance at the front and back of the workstation, operate it on a sturdy level surface, and ensure the ambient air temperature falls within the environmental specifications (5°C to 35°C operating temperature). Never block any vents or air intakes, and for cabinet installation, ensure adequate cabinet ventilation so the ambient temperature within the cabinet does not exceed specified limits. (Page 14-15)