What operating temperatures and humidity levels are safe for the HP Smart Tank 790?
The printer operates safely in temperatures ranging from 5 to 40°C, with a recommended range of 15 to 30°C. The operating humidity range is 15 to 80% RH (non-condensing), with a recommended range of 20 to 80% RH. (Page 2)
From the official HP Smart Tank 790 manual, page 2
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