My box fan has been running around the clock for nearly 3 months now.
It only gets shut off when I leave for a weekend, or during rain
storms when I need to shut the window. Otherwise it sucks air thru
the house 24/7. I cant afford the electricity to run a window Air
Conditioner. Box fans use little energy compared to an AC.
On Aug 10, 11:44 pm, firstname.lastname@example.org wrote:
Yep. But just look how much safer you would be without the box
fan...lets see, known problem (not the 'could have' 'might have'
problems) divided into the population equals? I guess some
vanishingly small chance of it causing a problem.
Well, just to be really safe, I am going to have a welder make a solid
steel box to put the fan inside. I figure it needs to be at least 1/2
inch thick solid steel with no holes anywhere. The cord will go thru
a piece of well pipe and be connnected right to a breaker in the
breaker panel directly, because plugs can create resistance and thus
heat, and fire.
What happens to them if you sit them on a window sill? I've seen many used
like that; I'd guess millions nationwide are in windows. I've never seen a
caution about not using them in a window.
However, I did find this on Lasko's web site:
Can I use my Box Fan in a window? Most box fans are not designed for use in
Note the word "most" as opposed to using the word "no".
And the don't give any specifics here
What is a Window Fan? A fan mounted in a window to circulate the air. Window
fans are used for air intake, air exhaust, or air exchange. The blade size
ranges from 8" to 16"
Then, you have this that tells you how to use a box fan in the window.
Place fans in windows. Close the window as tightly as possible around the
fan to hold it in place and prevent local circulation
Of course, this box fan is designed for use in windows
Evidently, geeks don't know everything, even wise ones
Many homeowners also choose to place a box fan in an open window, similar to
an air conditioning unit. If the home owner places the box fan in the window
so the front faces outdoors, the box fan will draw warm air out from inside
the home. If the homeowner places the box fan with the front facing inside,
the fan with draw in air from outside..
You can even rent one for $3 a day
And some people just love them in the window
One feature my Lasko 20â box fan has is its compact design. It fits very
well in my window. I can use it to bring in the cooler air from the outside.
This works remarkably well. This is known as an economical in-window air
conditioner. Another nice thing about its size is the fact that it is not
cumbersome to carry out of the store. It fits into my trunk perfectly, also.
My Lasko 20â box fan is also lightweight. Considering its size, I found that
very surprising. It also is very welcomed.
Seems like you have a big job ahead convincing people to take the box fans
out of the window.
A window fan is intended to seal the window space so it can inhale as
well as exhale.
Placed a few inches from a screen, a box fan won't inhale much through
the screen but will exhale very well through the screen. This can be
demonstrated by dangling a piece of toilet paper beside the fan. If
it's blowing toward the screen, there won't be much air movement beside
the fan. If it's blowing into the room, the toilet paper will probably
be sucked toward the screen and into the fan. The viscosity of still
air makes it hard to reach the fan through the screen, so air from the
room is sucked around behind the fan.
When a fan exhales toward a screen, the velocity of the air will carry
it right through. A fan 6" from a screen will do better than one 6'
from the screen because the velocity will be greater at the shorter
A 20" box fan should exhale twice as efficiently as a 10" window fan.
The smaller fan would have to impart 4 times the velocity to blow the
same volume as the larger fan, and that means 16 times the energy.
I have a couple of loops of cord tied through the top of my 9-pound box
fan. It takes just a moment to hang it from hooks at the top of my
kitchen window, where the air is hottest and most humid and there may be
smoke in the event of a cooking mistake. If I want to cool the house, I
walk outside and feel for any movement of air. If there's air coming
from the direction of that window, I'll put the fan on a table in a
window on the other side of the house. No use fighting Mother Nature.
Who would be willing to fork-out $200 for this Made in USA product?
Lasko and Lakewood are made in America from foreign and domestic
parts. My box fans are Lasko and more than 10 years old and no issues
Air King is now a Lasko subsidiary. The 9166 made its name as a fan
that would blow 7000 cfm. Evidently, the construction wasn't good
enough for that much power; bearings seized, blades cracked, and grilles
broke. So they put on a wimpy motor for which they claim 3650 cfm.
I believe the Lasko 20-Inch Premium Box Fan ($24 at Amazon) claims 3623
cfm for only 150 watts. The manufacturer claims it blows 30% more than
other fans. In that case, it would need more stability. Indeed, it is
heavier and deeper than typical of plastic box fans. The 28 reviewers
seem to have a consensus that it blows more than other box fans they've
I once tested box fans for thrust by weighing them, hanging them by 6
feet of cord in the carport, and seeing how far back they moved when I
turned them on. From pounds of thrust and diameter I could compute cfm.
I remember my 9-pound Holmes was very wimpy compared to my antique
24-pound Lau. Dadburnit, I'm getting knocking from the Lau motor now!
I think the bearings are no longer handling the thrust. If I could find
a replacement motor, it would be expensive. I wonder if it's easy to
get bearings for a motor with a 3/8" shaft.
On Tue, 10 Aug 2010 22:29:04 -0400, "Ed Pawlowski"
It's a WIKI - take it with a few grains of salt.
Any moron can write anything and look like an expert.
It is designed that it will stand up to weather IF used in a window -
still not designed "as" a window fan - but unlike "most" the fan is
weatherproofed like a windowe fan motor.
The same lasko as sold by Home depot - it is ACTUALLY an
indoor-outdoor fan - designed to be used on patios etc, not as a
window fan - but as such it is safer than MOST box fans if you are
going to use one in a window.
Also considerably smaller than the "average" box fan, at 22" overall,
with a 20 inch blade
If anyone is really interested in anything more than flapping their
gums, the URL is for a 2003 Consumer Products Safety Commission report
on this very subject.
There were an estimated 4,500 fires associated with portable electric
fans from 1990 through 1998. These fires resulted in more than 20
deaths, 270 injuries, and about $55 million in property loss.
Staff reviewed 243 fan-related In-Depth Investigations (IDIs),
conducted from January 1, 1990 through April 12, 2001. These IDIs
included those in which the identified hazard was fire (210), potential
fire (16), electrocution (12), electric shock (3), and electrical
reported sales of portable electric fans have been in the
range of 17 to 20 million per year with an average life expectancy of
fans is 12 years. Based on this information, staff estimates there are
about 200 to 240 million portable fans in use in U.S. households.
Thus the odds don't seem all that good.
I want to find a voracious, small-minded predator
and name it after the IRS.
While the danger is probably there, the numbers are very low. That are
about 500 fires a year and 2 deaths. Check out how many car accidents that
result in death in a single year. Somewhere around 40,000. Not to count
the number of accidents that result in injuries and money cost.
You are more likely to die just going to the store to get the fan than for
it to cause a fire or death.
It is even estimated that about 50 to 100 deaths each year are caused by
I wonder how those 243 incidens compare with other hazards such
kitchen fires started by leaving stuff on the stove, other small
electrical appliances, etc.
From what I am seeing the "Oh My God! Get rid of yur box fan!" crap
is a tempest in a tea pot.
You can read about it here:
About 500 deaths from kitchen fires per year and 4600 injuries and $ 756
million in property damage.
Guess we will quit cooking and eat out. Oops can not do that because of
death by automobile. Just quit eating. Sure hope that death rate is lower.
Time we eliminate _everything_ that has caused a few deaths in the
house it will be nothing but a bare concrete slab...oops can't use
that either. people have died pouring it.
There is paranoia and then there is outright idiocy - case in point
That's interesting. It's all portable fans, including those designed as
Several cases seem to remain mysteries. There's soot but no other
evidence of overheating. There's evidence of overheating, but the motor
Fans are supposed to be protected from overheating in the event of a
locked rotor, and the ones tested have worked.
Cords are often the problem. Some people I know will continue to use a
cord when there's a warm spot.
It looks as if most problems would be minor of there were an adult
present to smell trouble and unplug the fan.
a ceiling fan motor is probably built more robustly than a cheap box fan
motor. CF's are made to be installed "permanently",and thus made better
than a throwaway $20 box fan.
It's also away from physical abuse that a floor fan may suffer,no getting
knocked over,stuff spilled on it.
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