This round-shaped space-saving Levoit Core Mini Air Purifier base with a 4-inch duct adapter is inspired by the original design by @alex1075. I’ve modified it to feature a round shape and added a 4-inch duct adapter to better work with the low-profile exhaust vent designed by @mcmaven. Please note that this is specifically designed for the Levoit Core Mini Air Purifier, not other Core model, such as Core 300 or Core 600—keep this in mind before printing. I’m not an expert in 3D modeling or Autodesk Fusion 360 (especially editing the mesh file), so feel free to tweak and improve my design as needed!

I also offer an enhanced version which optimizes airflow and efficiency by making better use of the cylindrical air filter’s surface area.