While you are looking at whole house fans you need to also look at ways to add solar power. The best source for solar systems is POWUR and the best way to understand solar for your home is to go here http://www.POWUR.com/kurt.shafer/learn
You have many options
1. Have me you a quote for solar power for your home.
2. Join me on my team and become a solar advocate – then put in your own solar system and save $1000.
3. Join me on my POWUR team and become a solar consultant and sell solar and make over $3000 on each sale.
See how to join my POWUR team here http://www.POWUR.com/kurt.shafer/register