Pioneer VSX-819H Operating Instructions Manual page 7

Before you start 01
Slot and openings in the cabinet are provided
for ventilation and to protect the equipment
from overheating. To prevent fire hazard, do not
place anything directly on top of the unit, make
sure the openings are never blocked or covered
with items (such as newspapers, table-cloths
and curtains), and do not operate the
equipment on thick carpet or a bed.
7
En