The EcoFlow Wave 3 is the third generation of portable heat pumps that combine cooling, heating and dehumidification in a device the size of hand luggage. With 1,800 W of power (6,100 BTU), it cools a room by 8 °C in 15 minutes, and in winter with 2,000 W of heating, it raises the temperature by 9 °C also in a quarter of an hour. Add a 1 kWh LiFePO₄ battery, Wi-Fi/Bluetooth connectivity and new smart modes (Sleep, Auto, PetCare) and you have a gadget that suits van-lifers, campers and anyone who wants a backup “air-con” for the home office.