Portable ac modification

Ok so my portable ac has a vent to duct hot air… on the back, split it… so you got top half and bottom half… top half has the filter and is the air blowing out of the machine…the bottom is intaking air to cool it… and that’s the air going out the ducted exhaust… if I put the ac on the outside of a room and duct the cold air in and build a return that went to the top half of the back of the ac… wouldn’t that make it to where I could use it for a sealed room? The thermostat is on the intake/return…

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Just FYI… building a “return” and putting the ac on the outside of the room worked… works well…