Took measurements of return filter for 2 units,,, found one of them open,, customer stated that one of them wasn’t cooling properly,, highly believe it’s the one we found open,,both units are using 2 inch filters one of them might be 16x32x2 (2),,, the other one seems 16x23x2 (4)on this one it can be 2 or 4 inches,,will upload pictures for better reference this unit was found without filters,, didn’t have any.