Question Is it normal that the G-Force gets very hot after 3-4 hours of use
Yes, that is perfectly normal. It's advisable to ensure that the unit is properly ventilated, and if possible, leave one rack space empty both above and below the unit. However, if you don't experience any actual malfunction of the G-Force, no further measures are necessary.
Keywords: G-Force: Getting hot after a few hours,G-FORCE