HP Netserver Service Handbook, Volume 1 - Low End

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Acoustic emission:
Sound level (LpA): < 45 dB(A)
Input Voltage Power Consumption
100 to 127 Volts AC ~ 5.0 A
at 50 - 60 Hertz or
307 watts maximum
with 110 - 220 volt line voltage
200 to 240 Volts AC ~ 2.85 A
at 50 - 60 Hertz
369 watts peak
with 110 - 220 volt line voltage
Heat Output Power Availability
1000 BTUs/hour maximum peak 200 watts continuous
252 KCals/hr 224 watts peak