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Thank you for your inquiry! If you use a longer drain hose with your Insignia™ 350 Sq. Ft. Portable Air Conditioner and the hose rises above the height of the unit, it likely won’t drain properly. These air conditioners rely on gravity to expel water, so the hose must slope downward from the unit to allow for continuous drainage. If the hose is elevated, water can back up into the system, which may cause the unit to shut off automatically to prevent overflow or internal damage. In some cases, it might even trigger an error code or result in internal leaks. To avoid these issues, always ensure the drain hose runs downhill without any upward bends. Keith | Insignia Support
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