HP Officejet Pro K850dn Printer - Manual (Page 128)

Environmental specifications
For media and media-handling specifications, see Selecting print media .
Operating environment Operating temperature 5° to 40° C (41° to 104° F)
Recommended operating conditions 15° to 35° C (59° to 95° F)
Recommended relative humidity 20 to 80 percent noncondensing
Storage environment Storage temperature -40° to 70° C (-40° to 158° F)
Storage relative humidity Up to 90 percent noncondensing at a
temperature of 65° C (149° F)
120 Chapter 9 Printer specifications ENWW