Do you want
Then the Barter Automatic Lock Arm is the awning for you.
The arms are available in various projections. The greater projection will allow more ventilation through an open window.
The smaller projection will minimize loss of access. The headbox and front rail are made of roll-formed Colorbond steel and all other components are galvanized steel.
When fully extended the Barter Automatic Lock Arm will cover the entire window. If the traditional type of awning canvas is used this will make the room dark. If more light is needed then Acrylic fabric or mesh fabrics should be used.