well heres a bad attempt at drawing it lol.
Basically that square in the middle is the area beneath the table/desk. My options are to put it put front of the surge protector, which is about a little more than a feet away from the heater OR on top of the desk next to the monitor. But the problem with putting it next to the monitor is that I've noticed when i use to put a small fan to the right of the monitor during the summer,a small portion on the right side of the screen would create a small little ripple effect or waves that go down the screen, hard to describe it. Not sure if that would happen If I put the case next to the monitor.