HP LaserJet 4250 - Manual (Page 247)

Operating environment
Environmental condition Printing Storage/standby
Temperature (printer and print
cartridge) 10° to 32°C (50° to 90°F) 0° to 35°C (32° to 95°F)
Relative humidity 10% to 80% 10% to 90%
ENWW Operating environment 235