HP 354556-002 - Manual (Page 54)

54 HP BladeSystem p-Class Enclosure Installation Guide
CAUTION: Always use blanks to fill empty spaces in
enclosures. This arrangement ensures proper airflow. Using an
enclosure without the proper blanks results in improper cooling that can
lead to thermal damage.
Two mini bus bar configuration example
CAUTION: Always use blanking panels to fill empty vertical
spaces in the rack. This arrangement ensures proper airflow. Using a
rack without blanking panels results in improper cooling that can lead to
thermal damage.