Has anyone had success using a regular 20" box fan (2500cfm) as a whole
The $200 WHF's are more sturdy and move more air but since I would only use
the fan 15-20days a year I think the cheaper box fan would be sufficient. My
top floor area is 1600sqft and the basement is approx 1200 sqft.
I use the cheapo $20 window fans. Put one blowing out in each window at one
end of the house. At the other, put one in each window blowing in.
If you want to blow inside air out (like in the evening when its cooler
outside), either set up all the fans to blow in, or all the fans to blow
out, and open the other (non-fan) windows.You can control what rooms gets
ventilation (and how much they get) by adjusting the amount that the windows
in that room are open.
A whole house fan doesn't work in our house because of hte way its laid
out - its too broken up and compartmentalized.....
It would work fine by adjusting window openings. If you can do it with window
fans, a whole house fan would work too.
The only thing that may prevent a whole house fan from working correctly is
insufficient roof ventilation.
I have used that idea, but I use a 20 inch round industial fan, moves 2x the
air a box fan does. I place mine into the crawl space hole blowing up. Then
open some widows on the opposite side of the house. The more air you move
the cooler you house will get.
I get a +5-7 degree difference to the outside air. House is higher by that
Box fans are next to useless in this application. However, you do not
have to go all the way to an installed whole house fan. Lakewood makes a
large "high-velocity" fan that fits in a window and has AC-like accordion
sides to block air from leaking back through the same window. This fan
works very well. I bought mine locally but I have also seen it on the
web, about $70 or so last time I looked. They have 2 sizes, use the
larger one if it will fit.
Make sure you close all windows near the window the fan is in, and open
windows on the far side of the house. Work with prevailing breezes--if
your ummer breezes are from the south, put the fan in a north window
(blowing out, of course). Go the one of the open windows and test with
the fan on and off---you'll feel a huge difference. Do the same test with
a cheap box fan---nothing.
I use a 3-speed 16" Patton industrial fan, a PVC automotive fan
shroud, and a 24-hour lamp/applicance timer for my
"window-mount-whole-house-fan". Works great! And everything was
"dhove" from a dumpster.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.