I have an existing through wall unit. Can I replace it using a same size window unit,using the existing sleave in the wall. Or are the vent holes different in a wall unit vs. a window unit?

I have an existing thru wall unit. Can I replace it using a same size window unit,using the existing sleave in the wall. Or are the vent holes different in a wall unit vs. a window unit?


Pay attention to the air in and air out configuration, most "window" units are side discharge , and the through the wall units are rear intake and discharge


And we all know air flow is most important