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Hi AM - Thanks for viewing GE! Portable air conditioners exhaust hot air produced by the cooling (heat exchange) process through the exhaust hose. This is why it is necessary to use the exhaust hose and why it must go outside. If you have any additional questions, do not hesitate to ask, we are also happy to help at GEAppliances.com! Sue
Sorry, there was a problem. Please try again later.Must use hose out the window
Sorry, there was a problem. Please try again later.Always, otherwise the hot air will stay inside the room.
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