Yours an Air-cooled generator?

http://www.generac.com/for-homeowner...oducts-in-2014

 

I have same one , 20KW, natural gas fired, powers whole house-takes over entire electrical panel, pool pump,well;generator costs more, but electrical set up less involved because individual desired circuits to connect not needed-saves electrician time as 1 connection to entire panel. Both would work just fine. Excellent unit

 

Big is better.

 

I think the 22KW generator will barely run one of my machines. This 120 KW unit sounds pretty good actually.