I don't think it will be a problem if there is a place for the hot air to escape from under the desk.
Perhaps you might set the desk back a few cm from the wall. Otherwise, you feet will get toasty.
this is the desk model
and the computer is set next to the iron bar. So the side that doesn't have a fan is to the iron. So there is plenty of space hot air to escape both from behind and from the side and from the front.