EasyJet is trialling cabin air dehumidification systems on four aircraft, with a view to potentially expanding the weight-saving technology across its Airbus A320 fleet.
The UK budget carrier contracted Sweden-based CTT Systems to supply its "Zonal Drying" units for a 12-month evaluation period.
The approximately 30kg (66lb) equipment extracts moisture from the cabin air, which mainly results from the occupants' exhalation but also other sources such as coffeemakers.
The dry air is distributed across the aircraft's upper fuselage area to avoid condensation on the airframe structure - which cools down at altitude - and water accumulation in the insulation blankets.
The equipment consists of a fan, heater and fibreglass rotor which has been impregnated with silica gel to absorb and dissipate the moisture.
EasyJet says that reducing water accumulation in the insulation blankets can cut weight by up to 250kg per aircraft and thus reduce fuel consumption by up to 4,500t a year.
The airline adds that if the trial is successful, it will install the equipment on more aircraft "with a view" to rolling it out across the whole fleet.