[widebody911]

Two stage compresses the air in one chamber, then compresses it some more in a second chamber.

Stay away from 'oiless' comrpessors.

Get the biggest one you can afford.

I installed mine outside and built a nice little 'doghouse' for it to keep the noise down, and then plumbed underground and through the wall into the shop. It's nice to be able to work and not be deafened by the compressor.