Whole home fans don't get the fanfare that central air conditioning systems do and we think you should know why. Basically, it all comes down to money. Whole house fan cost is far cheaper than central air systems, both in whole house fan installation costs and how much energy they use to run. They also aren't effective in all climates, so there is a limited consumer base. But these are exactly the reasons that we think you should get one. The Bay Area whole house fan benefits from the perfect climate for this cooling system and the high price of electricity makes it the clear choice when it comes to efficiency.