You can now download 3D CAD models of Noctua fans, but the company warns they ‘will not perform well when printed’
via noctua.at
Short excerpt below. Read at the original source.
Noctua has released 3D CAD models of many of its fan designs, which is good news if you’re 3D printing a project that plans to make use of them. You won’t be able to print a straight-up clone, though, as the company has deliberately modified some of the crucial details, like the fan impeller geometries. […]