Outside/Recirculated Air Mode; When The Outside Temperature Exceeds 75 F (24 C) And The Air Conditioning System Is On; Automatic Mode For Air Intake Control; Micro Dust And Pollen Filter - Lexus GS450h Owner's Manual

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5-2. Using the air conditioning system and defogger

Outside/recirculated air mode

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When driving on dusty roads such as tunnels or in heavy traffic, set the outside/
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recirculated air mode button to the recirculated air mode. This is effective in pre-
venting outside air from entering the vehicle interior. During cooling operation, set-
ting the recirculated air mode will also cool the vehicle interior effectively.
Outside/recirculated air mode may automatically switch depending on the tem-
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perature setting or the inside temperature.
When the outside temperature exceeds 75°F (24°C) and the air conditioning sys-
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tem is on
In order to reduce the air conditioning power consumption, the air conditioning
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system may switch to recirculated air mode automatically. This may also reduce
fuel consumption.
Recirculated air mode is selected as a default mode when the power switch is
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turned on.
It is possible to switch to outside air mode at any time by pressing
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Automatic mode for air intake control

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In automatic mode, the system detects exhaust gas and other pollutants and auto-
matically switches between outside air and recirculated air modes.
When the dehumidification function is off, and the fan is operating, turning automatic
mode on will activate the dehumidification function.

Micro dust and pollen filter

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In order to prevent the windshield from fogging up when the outside air is cold, the
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following may occur:
• Outside air mode does not switch to
• The dehumidification function operates.
• The operation cancels after approximately 1 minute.
In rainy weather, the windows may fog up. Press
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In extremely humid weather, the windows may fog up.
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The pollens are filtered out even if the micro dust and pollen filter is turned off.
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When the S-FLOW mode operates
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If air flows to the driver' s seat only, the temperature setting for the front passenger' s
seat is not displayed.
GS450h_OM_OM30E26U_(U)
(recirculated air) mode.
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