Here in TX it has been constantly over 100 for a while now. In my garage with the door up it is still at least in the upper 90's. I have a small fan blowing directly on the bottom of the G540. I was thinking about buying some aftermarket heat sinks and placing them on the bottom and building an enclosure that houses a decent fan and has adequate ventilation. Just was wondering what you guys were doing because this little thing gets HOT just jogging the machine around a bit.