[GregH]

Sorry but it is not advisable to paint indoors with an air operated sprayer.

How an air sprayer works is that it sends a stream of air through the nozzle to carry the paint which causes an incredible amount of paint mist.
In addition to being a breathing hazard you would have a problem seeing in no time.

What you need is an airless sprayer.
Either a large high pressure piston type that atomizes the paint with no air behind it or a small Wagner type power painter.

Really, by the time you set up then clean the equipment one room would likely be faster to paint with a brush and roller.