On 07/25/2013 08:10 AM, DerbyDad03 wrote:
Ed Pawlowski wrote:
On Thu, 25 Jul 2013 01:58:34 -0700 (PDT), Senin
wrote:
I just saw this video
http://www.youtube.com/watch?v=rhz78ukb0TY
regarding how to keep you house cooler in the summertime by cooling the
attic with a box fan.
I was wondering what you guys think of it?
Do you think it would work?
Do you think there is a fire danger with the heat/electricity in the attic?
Anything that moves the hot air out of the attic space is going to
help. This is just a cheap version of a Whole House Fan.
Whole house fans are better made, more durable, probably safer than a
$15 box fan. It will also move more air.
Good side
On a cool night it will suck in the cooler outside air and vent the
attic
Bad side
One hot day, you are sucking hot air through the house and while it
may cool the attic, it may heat the living space more than keeping
windows closed and shades drawn.
It does not reduce the humidity like an air conditioner.
Another option. Consider an attic fan that just vents the attic and
does not suck the outside air through the house. That is the best
idea when the sun is beating on the room. Use a fan built for those
uses and keep your family safer.
What kind of attic fan just vents the attic and doesn't suck outside air
into the house?
Isn't that suction dependent on a number of factors, including, but not
limited to, the size of the fan, the ventilation openings in the attic, the
tightness of the house/attic junction and the tightness of the house
itself?
It's not like you can go buy a fan that lists "doesn't suck outside air
into the house" on the spec sheet.
What are we talking about here? I've seen two different arrangements,
both which work but in different ways.
There's the "whole house fan" typically installed in a hallway ceiling
that will suck air from within the living space and blow it into the
attic; this not only cools the attic but draws (presumably cooler, when
used at night) outside air into the living space.
There are also powered vent type arrangements that only move air through
the attic to keep temps down in there in the summertime; those are
typically controlled by thermostatic switches.
nate
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