Quote Originally Posted by WyoRoy View Post
For home use air is not okay. TIG, or GTAW, welding uses an inert gas, typically Argon or Helium, as a shielding gas.

A 30 amp 230v circuit will work for the Diversion 180, per the online owner's manual. Miller offers quite a lot of useful information if you will take the time to look in the Resources section at the top of the page.
Air Cooled Torch- Knucklehead