What are the recommended operating temperature and humidity ranges?
The recommended operating temperature is 17.5° to 25°C (63.5° to 77°F) with relative humidity of 30% to 70%. The allowed operating range is 15° to 32.5°C (59° to 90.5°F) with 10% to 80% relative humidity. (Page 11)
From the official HP LaserJet Pro M402 M403 Printer manual, page 11
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