methods and devices for deicing aircraft and other snow or ice covered surfaces . the invention is based on warm moisture - laden air or steam that can be released over the surface to be thawed . the device consists of three components : a hot water or steam boiler with an associated pump ; a plenum for heating and humidifying air ; and a delivery unit or head that brings the moisture - laden air or steam into contact with the surface to be de - iced or thawed . various delivery heads are also described .