Hi there,
I could design your air purifier, just let me know what kind - it's your model (I can sign the NDA if necessary) or a regular one(send me the link).
As a mechanical engineer with over 15 years experience on modeling, prototyping and effective manufacturing, I could complete this job in very short time - about 5 days, and very high quality.
What I'll deliver: 3D model in different file formats (iges, stl, step, obj - to embed in website), 3D pdf - so you may open the model with regular Acrobat Reader, drawings and renderings.