On Sat, 15 Jul 2017 11:14:24 -0400, Jack wrote:

On 07/15/2017 10:44 AM, FanOfWholeHouseFans wrote:
replying to JimT, FanOfWholeHouseFans wrote:
I beg to differ with "better than nothing." . Living in a dry climate
where
the nights cool down very nicely, a whole house fan is the way to go for
cooling cheaply and sustainably in an overtaxed climate, and it works
well.
Shut curtains and Windows all day to keep cool air in and hot air out.
Then,
once the evening outside temp drops near or below the inside temp, we
open
every window and switch on the whole house fan, which cools down the
house
lickety split with fresh air. BUT, these things are loud and we could not
sleep with it on or watch tv or talK on the phone. So I too keep
looking for a
variable speed fan that we can run quietly on low all night and when
we need
to hear. Would someone please manufacture these. There are lots of us
out here
who hate AC and want to do things more sustainably and who prefer
exchanging
stale house sir with fresh air, and who live in places where cool
night air in
summer is the best way of truly conditioning the ai!


The "ideal state" is generous venting at the peak and soffits of your
roof. If the attic temp goes 5F above outdoor ambient, you need to add
more attic venting.

A hotter-than-ambient attic just needlessly raises your electric bill.
There are many places where even with "excessive" ventiung the attic
will be WAY over 5 degrees over ambient. If I open the 62 foot gable
end door in the attic of my 15X15 foot shed and open the 6'6"x32" door
in the bottom, with a 3.3X3.3 foot opening between the main shed and
the attic, on an eveage summer day it will be over 10C hotter in the
attic, unless the breeze is coming from the south, blowing in the
attic door. The toof has a full length ridge vent and about 90 square
feet of fully open vented soffit