NateGreat wrote:What’s the deal with the systems onboard planes such as the Airbus A350, Boeing 787, and future Boeing 777X that allow the cabin to be pressurized at a lower altitude, and humidity to be pumped into the cabin? Are those systems something that can be retrofitted onto older planes such as the Airbus A330, Airbus A330neo, and Boeing 777-200/300?
travaz wrote:Is the humidity increased by introducing water vapor from some sort of tank or is it taken from the outside air? I know at altitude the air is very dry. So how is the humidity increased?
SteelChair wrote:Does anyone know which airlines chose to get the option for humidity and those who didn't? And on which types?
BravoOne wrote:Had a humidifier for them main cabin of a privately owned 757. To say it was maintenance intensive is an understatement. Don't know who manufactured this system.
BravoOne wrote:SteelChair wrote:Does anyone know which airlines chose to get the option for humidity and those who didn't? And on which types?
On what airplane are you asking about?
CosmicCruiser wrote:BravoOne wrote:Had a humidifier for them main cabin of a privately owned 757. To say it was maintenance intensive is an understatement. Don't know who manufactured this system.
it's my understanding that originally the MD-11 had a humidifier and Fedex disabled it for the exact reason you mention. Just as it disabled drooped ailerons. Any FX maint guys here?
BravoOne wrote:I see nothing that would indicate a humidifier system is available for the 787 cabin. Flight deck, yes, (optional) Cabin, no.
The environmental control system provides a relative humidification level within the passenger compartment of 12
percent to 16 percent during normal cruise operation. The air purification system includes ozone removal, high-efficiency particulate air (HEPA) filtration for particulates, and gaseous purification for contaminants.
HEPA-type filtration for particulates is effective at filtering viruses, bacteria, and fungi. The gaseous purification
technology has an absorbent that is integrated with the HEPA filters on the lower recirculation system.
Flight Deck Humidification
The relative humidity within the flight deck is approximately 1 to 2 percent during normal cruise operation. Partial
provisions are supplied for installation of a flight deck humidification system.
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