Under The Hood vs Onan - A Question!

[Ron J. Moore]

I was watching an advertisement for one of the big A's, and they were saying that on extremely hot days, the a/c at the dash just might not be enough - so throw on your Onan and the house a/c. This got me thinking about the Under The Hood Model - will it operate the a/c while running? I am really not knowledgeable about all these systems, but ask the Group who really have the knowledge. Ron