can I lay an intel imac down almost flat or will it overheat?

[mufngruf]

I have acquired a desk that allows a monitor to be mounted at a good viewing angle but sort of inside the desktop. It would sure clear my line of sight from my desk if I could mount my 20" imac inside this desk top. There is plenty of clearance underneath for air circulation and for the stand (which apparently cannot be removed) but I AM concerned about overheating. If all other elements (ventilation etc) are good, is there any reason that the angle itself will negatively affect the imac?
As always, thanks for the help.

 

[300D]

Angle does not affect cooling. What matters is that it needs unrestricted airflow in the bottom and out the top. If its inside the desk, it needs to have ventilation holes.