Flight crew rest and attendant rest environmental control system

A method of preventing icing conditions in an aircraft ventilation system, the method comprising:

• receiving ventilation air from an upstream ventilation system architecture of an aircraft ventilation System;
• passing ventilation air through a heater at a first location;
• sensing an actual ventilation air temperature at a second location downstream from the first location;
• comparing the actual ventilation air temperature with a predetermined range of temperatures above the freezing point of water;
• and
• controlling the heater responsive to the comparison of the actual air temperature with the predetermined range of temperatures to maintain the actual air temperature within the predetermined range of temperatures such that formation of ice is minimized in thin aircraft ventilation system.

An anti-icing system for an aircraft crew rest ventilation system, the anti-icing system comprising:

• an air duct arranged to receive a volume of ventilation air from an upstream ventilation system architecture of an aircraft ventilation system, the air being arranged to transfer the volume of air to a downstream ventilation system architecture of the aircraft ventilation system;
• at least one heater interposed within the duct, the at least one heater being arranged to heat the ventilation air;
• at least one temperature sensor in thermodynamic communication with the volume of air within the duct, the at least one temperature sensor being located downstream from the at least one heater, the at least one temperature sensor being arranged to determine actual temperature of the ventilation air;
• a controller in electrical communication with the at least one heater and the at least one temperature sensor, the controller being programmed with a predetermined range of temperatures above the freezing point of water, the controller being arranged to control the heater responsive to a comparison of the temperature of the actual temperature of the ventilation air to the predetermined range of temperatures to maintain the actual ventilation air temperature within the predetermined range of temperatures such that formation of ice is minimized in the aircraft ventilation system;
• at least one filter interposed within the duct downstream from the temperature sensor, the filter being ranged to allow the ventilation air to pass therethrough and to minimize the passage of ice therethrough;
• and
• at least one shut-off valve interposed within the duct downstream from the filter.