Symbol 3457 from ISO 7000 - Title/Meaning: Operator cabin, outside air flow Function/description: To identify the control that allows fresh air to enter the operator cabin from outside. To indicate the operational status of the outside air flow function.
pay attention to orientation of symbolAdditional information: 
Symbols applicable to specific machine forms may be substituted for this symbol.
Own work using: iso.org/obp/graphics/grs/72c126db-81f4-411f-8317-3d25d877a002 200.png
Vectorization:  Mrmw