If you are thinking about a whole house fan you can now get a good discount on yours AND get a nice donation to Oak Grove Center. The fan I am offering is the VentCool Summit 4.9 with 5,202 CFM that has a retail price of $1450. (more air flow than our local QuietCool source - this Summit 4.9 is one of the best - only Tamarack in Massachusetts has more air (5800 CFM)but their price without installation is over $2000).
I can discount it for you to $1300 if you will send me $400 as a down payment. I will send $100 to Tammie. There are local installers who will put it in for under $500. So your total cost including installation will be no more than $1800. Plus tax on $1300 and shipping if you need it shipped. It can be picked up in Corona off Temescal Canyon.
PS I have been selling whole house fans since 2008. There are hundreds of very pleased owners of my fans. You can see them here - http://thorwaldsonwholehousefans.com/testimonials/