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Hello MagSC! We recommend installing the hose into the window when using the air conditioner FFPA0822R1 to distribute any hot air. Using the air conditioner without the hose will cause improper temperatures within the space. We hope this information is helpful. –Thanks!-
Sorry, there was a problem. Please try again later.The exhaust hose you have to use if that's what you mean. The dehumidifier you don't have to use. I don't and the unit works just fine. I hope this helps.
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