The system removes moisture by taking air from the crown area or cargo area and feeds it though zonal dryer units between the cabin and the outer skin of the aircraft using a specially designed piccolo duct. This lowers the dew point in the crown area preventing the condensation process from occurring, thus keeping the insulation blankets dry. Zonal Drying system is standard equipment on the Boeing 787 "Dreamliner". 

EasyJet already operates one of the industry’s cleanest, youngest, most fuel efficient fleet and the launch of the trial further demonstrates the airline’s commitment to using the latest technology to minimize the fleet’s environmental impact. An EasyJet passenger’s carbon footprint is already 22% less than a passenger on a traditional airline flying on the same route and aircraft. 

The Zonal Drying system consists of a fan, heater and a moisture absorbing, silica impregnated rotor made of light-weight fiber glass which will improve air quality onboard as well as reduce water retention by channeling dry air to the crown area of the aircraft. 

With weight also being the key factor which influences aircraft efficiency and fuel use, the Zonal Drying unit’s use will contribute towards reducing the airline’s £1.2 billion annual fuel bill.