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9. Ventilation: Slots and openings in the
cabinet are provided for ventilation to
ensure reliable operation of the
product and to protect it from
overheating. These openings should
never be blocked by placing the
product on a bed, sofa, rug, or other
similar surface. This product should
not be placed in a built-in installation
such as a bookcase or rack unless
proper ventilation is provided or the
manufacturer instructions have been
adhered to.