120mm CPU Heatsink Fan to 80mm Case Exhaust Duct

This is a duct that allows the CPU cooler fan to double as the case fan. The idea is to minimize the amount of noise caused by fans in a low-powered computer. This duct was designed to fit my particular CPU cooler (*Cooler Master Hyper 212 Plus*), motherboard (*GIGABYTE GA-Z68A-D3H-B3*), CPU (*Intel i3-3225*), and case (*generic ATX mid-tower from ~2001*). Therefore, it is highly unlikely to fit your configuration without modification. It is here more for inspiration. However, an Onshape link is