Re: House Fan
One thing that I'm surprised no one has mentioned is that the pictured fan is mounted in a wall with no protective shroud. Don't get me wrong, I personally don't care what someone does in their own environment, however with something of this nature, it lends itself to removing body parts pretty quickly if one should have a lapse in presence of mind. On a similar note, I've installed attic fans through the wall of living space, however they've been well above where someone - regardless of state of mind - could reach and injure themselves. Additionally, a "cabinet door" was placed over the fan to cover the hideousness of it when not in use.
As to a better technology, a dehumidifier or an A/C unit for the house would be a better means of cooling/dehumidifying the house than the fan when you don't have natural cooling in the evening (breezes, temperature drops, etc that naturally occur at night ). When humidity isn't a factor and you do have temperature drops at night, an whole house fan is the cheaper, better means of cooling your interior environment.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!