Fan Cowl 80mm to 57mm duct

thingiverse

I have an entertainment unit that has a bit of heat inside from A/V equipment. I have used an 80mm fan for ventilation, but the ventilation holes are only 57mm diameter. I needed an adapter to get better airflow. My first design works, but the ventilation hole I wanted to use was too close to a brace, so I had to do an offset version to fit. (The orange version) Both versions included here, along with the Fusion 360 files.