where to find air conditioner plans/blueprints? eng drawing recommendations?

[Wheatmaster]

I'm looking for a new project to do in engineering drawing and i'm thinking of designing or redesigning an air conditioner/ or the whole system. anyone know where i can find blueprints or diagrams?

if anyone else has suggestions for engineering projects (designing only ie autocad, inventor) please feel free to let me know

 

[NeoPTLD]

Maybe a service manual for an air conditioning system.

 

[Wheatmaster]

help i need ideas before tomorrow.