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Replacing Ceiling Fan - Page 4

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Posted by Paul on September 24, 2005, 11:16 pm
 


  If you look at the first link that Steve left on the PV News you will see:
http://www.quietcoolfan.com/
Halfway down the page it shows the baffles on the fan that close unless
there is pressure on them from the fan, thus sealing attic air from the
house.
These type of house to attic fans are partially paid for by utilities in S
Cal.
These may be the ones that some have read that can "save 15-55% on AC".



Posted by Drew Cutter on September 25, 2005, 12:36 am
 
Paul :

    From the picture on quiet Cool fans you will need a whole house fan
in every upstairs bed room and Multiple attic fans. Boy if this doesn't
add to the electric bill (especially the extra whole house fans). Not to
mention having enough solar panel to power the attic fans and one to
power radiant heat.

Paul wrote:


Posted by Solar Flare on September 25, 2005, 2:19 am
 There is always a moderating tradeoff. I think a blend of moderated
techniques is always in order for most things in life.


Paul :

    From the picture on quiet Cool fans you will need a whole house fan
in every upstairs bed room and Multiple attic fans. Boy if this doesn't
add to the electric bill (especially the extra whole house fans). Not to
mention having enough solar panel to power the attic fans and one to
power radiant heat.

Paul wrote:


Posted by Paul on September 25, 2005, 3:21 am
 

   I don't know much about those fans. I was following up on the comment
that one type of fan would allow attic heat back into the house. The local
utility would pay for larger systems of several fans as well. Not a
recomendation
but just a reference.



Posted by websurf1 on September 25, 2005, 5:53 pm
 
Paul wrote:


You are absolutely right, of course.  I was trying to emphasize the
_quality_ of the baffles/seals/closure.  Some baffles are more leaks
than baffle.  Drawing a vacuum in the attic will draw some house air
into the attic through anything that pokes the ceiling.  This situation
probably isn't as critical as mine, which is real air conditioning in a
Phoenix climate.
It really is difficult to advise or come up with ideas without seeing
the house or knowing more about it.  I've never had an _attic_ fan.
But I did have a whole house fan that was really a barn fan, put in a
particular location that changed all of the house air at night.  Worked
like a champ.
As an aside (and possibly another thread) I was once warned about attic
fans that run off automatic thermostats.  A house fire would warm up
the attic, turn on the fan, and that would make the fire burn faster.
I guess nothing's simple.


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