The De'Longhi Pinguino AP98 GentleJet is one of the brand's fastest and most efficient portable air conditioners. With 11,500 BTU of cooling and Arctic Gentle Surround technology, it cools a room up to 30% faster while staying remarkably quiet — and as a 3-in-1 unit it also works as a fan and a dehumidifier, so it earns its place all year round.