Environmental Requirements Keep the printer within the following environmental conditions for optimum performance. Table 2-1. Printer and Toner Cartridge Environmental Conditions Operating Storage Temperature 10° to 32.5° C (50° to 90.5° F) 0° to 40° C (32° to 105° F) Humidity 20 to 80% RH (with no condensation) 15 to 90% RH (with no condensation) C4085-91087 Environmental Requirements 49