To ensure cool operation, how much space is recommended in front of and behind an HP Z
Workstation?

A.
5 cm (2 inches)

B.
10 cm (4 inches)

C.
15 cm (6 inches)

D.
30 cm (12 inches)

Explanation:
http://content.etilize.com/User-Manual/1020048036.pdf(page 98, see the note)