12000 BTU 4-in-1 Portable Air Conditioner with Heater Fan and Dehumidifier

This Costway 12,000 BTU portable air conditioner adds smart WiFi control to a full four-season feature set, letting you manage temperature and modes from your smartphone wherever you are. It cools rooms of around 25 m² with 12,000 BTU, switches to a built-in 9,500 BTU heater for cooler months, and adds fan and dehumidify modes (five settings with auto) for everything in between. Dehumidification reaches 28.8 L/day and airflow a strong 400 m³/h, with a 60° auto swing spreading air evenly. A 24-hour timer plus the app means you can start cooling before you get home or switch off after you have fallen asleep, while an ultra-quiet sleep mode keeps nights peaceful; overall noise spans 50-65 dB. As a single-hose monobloc it must vent through a window using the 159 cm exhaust hose and 60-120 cm window fit – there is no hoseless cooling. An included 100 cm drain hose handles water removal, and control is via the WiFi app or remote across a 15-31°C range. The box includes the exhaust duct, connector, window adapter, baffle plate, drain hose, remote and user guide; at 31 kg on wheels it still moves easily between rooms.