Ram air channel arrangement for ambient air supply into an aircraft having: - a ram air channel which comprises a ram air inlet channel and a ram air outlet channel arranged downstream of the ram air inlet channel and in fluid communication with the ram air inlet channel, and - a cabin exhaust air line which is adapted to be flown through with cabin exhaust air removed from an aircraft cabin and which is connected to the ram air inlet channel and adapted to lead the cabin exhaust air into the ram air inlet channel, and - a control unit which is adapted to control an air mass flow through the ram air channel by appropriate control of a movable inlet flap which is arranged in the region of an inlet of the ram air inlet channel and is adapted to set an inlet flow cross-section of the ram air inlet channel, and/or of a movable outlet flap which is arranged in the region of an outlet of the ram air outlet channel and is adapted to set an outlet flow cross-section of the ram air outlet channel characterized in that the control unit is adapted to control the supply of ambient air into the ram air inlet channel in dependence on a cabin exhaust air mass flow supplied to the ram air inlet channel via the cabin exhaust air line, and in that the control unit is further adapted: - to determine whether the air mass flow through the ram air channel is greater than a setpoint, - if the air mass flow through the ram air channel is greater than the setpoint, firstly to reduce the supply of ambient air into the ram air inlet channel and only reduce the supply of cabin exhaust air into the ram air inlet channel if, on complete interruption of the supply of ambient air into the ram air inlet channel, the air mass flow through the ram air channel is still greater than the setpoint, and - if the air mass flow through the ram air channel is less than the setpoint, firstly to increase the supply of cabin exhaust air into the ram air inlet channel and only increase the supply of ambient air into the ram air inlet channel if, on a maximisation of the cabin exhaust air mass flow into the ram air inlet channel, the air mass flow through the ram air channel is still less than the setpoint. - a ram air channel which comprises a ram air inlet channel and a ram air outlet channel arranged downstream of the ram air inlet channel and in fluid communication with the ram air inlet channel, and - a cabin exhaust air line which is adapted to be flown through with cabin exhaust air removed from an aircraft cabin and which is connected to the ram air inlet channel and adapted to lead the cabin exhaust air into the ram air inlet channel, and - a control unit which is adapted to control an air mass flow through the ram air channel by appropriate control of a movable inlet flap which is arranged in the region of an inlet of the ram air inlet channel and is adapted to set an inlet flow cross-section of the ram air inlet channel, and/or of a movable outlet flap which is arranged in the region of an outlet of the ram air outlet channel and is adapted to set an outlet flow cross-section of the ram air outlet channel - to determine whether the air mass flow through the ram air channel is greater than a setpoint, - if the air mass flow through the ram air channel is greater than the setpoint, firstly to reduce the supply of ambient air into the ram air inlet channel and only reduce the supply of cabin exhaust air into the ram air inlet channel if, on complete interruption of the supply of ambient air into the ram air inlet channel, the air mass flow through the ram air channel is still greater than the setpoint, and - if the air mass flow through the ram air channel is less than the setpoint, firstly to increase the supply of cabin exhaust air into the ram air inlet channel and only increase the supply of ambient air into the ram air inlet channel if, on a maximisation of the cabin exhaust air mass flow into the ram air inlet channel, the air mass flow through the ram air channel is still less than the setpoint.