Well, I am not doing an off the shelf whole house fan. Clearly some of the issues you mentioned are very real. Dust can be easily handled with filtering. My

Well, I am not doing an off the shelf whole house fan. Clearly some of the issues you mentioned are very real. Dust can be easily handled with filtering. My summer long experiment proved that you can cool a house and avoid using the AC unit for a whole summer. This is at least true where I live. The next step is to come up with a plan for next year. Since a fan outside the downstairs kitchen window worked just fine, I don't have to rush to put in a commercial system. I can use all of next summer to experiment and find a better solution. You can cool my house during the summer for about $10 per month. That's the baseline from which I'll judge all other solutions.