On Saturday, August 30, 2014 11:48:33 PM UTC-4, Danny D. wrote:
trader_4 wrote, on Sat, 30 Aug 2014 04:27:21 -0700:



Are we talking about an attic fan or a whole house fan?



I'm not sure. I have fans in the ceilings.

What kind of fans are these?




I think I'm talking about just cooling the attic, which, is admittedly

steaming hot most of the time. I was guessing cooling the attic would

also cool the house. No?


Lowering the attic temp will help. The question is how much you can
reasonable lower it via the possible methods and how much actual benefit
that will have in the living space. The attic is insulated and that is
the primary means of preventing heat transfer. I notice you have blown-in
insulation about equal to the joists. In some spots, it's a lot less.
Adding more insulation would probably have a bigger impact year round
than adding a fan.




That tiny opening is too small for an attic fan.

OK. Good point. I've never seen an attic fan, so I don't know the size

of the opening.


Powered attic fans come in two main types. One is a roof mounted
mushroom type. The other is a gable type. Those can be had with
their own entire gable vent, ie louvers that open, etc or you can
get just a fan that goes behind an existing gable vent. The
latter could go behind your gable and blow air outside. I have
one like that.

But as I said, I've come to believe that a ridge vent is the better
solution.