Will my Duplicator i3 be able to print this hole in the vertical wall without infill? Will my Duplicator i3 be able to print this hole in the vertical wall without infill?
The wall is 7mm the diameter of the hole is 24mm, the shell thickness is 0.8mm.
The answer is yes. However I notice that some knowledge is missing due your comments. 

The walls of the part is formed by 1 or several lines, this lines are called shell.

The Infill is the part that fills all within the walls or shell; you can set the infill by 5% to 100% depending in how strong you need the printed part or set 0 to get an empty shell.

The printer can be able to print any part, but some areas will need supports, this suports is a kind of outerfill to support areas that could overhang basically walls with 45 degrees or less, this support can be easily removed from the final part