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It exhausts hot air that the unit has extracted from the living area.
Sorry, there was a problem. Please try again later.Hello Irapou, A portable air conditioner uses its vent hose to remove heat, so venting it outside makes the most sense in almost every case. If the heat from the exhaust fan can come back through the intake of the air conditioner, you're wasting money. Insignia Support, Merjorie www.insigniaproducts.com/support
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