I was reading a website once dealing with heatpumps and energy type stuff to
do with house environment conditioning and I came across something which
matched my needs and I do not know what this type of unit is called, and I'd
like to research them now that I had to cut a hole in my top floor ceiling
to drive away some squirrels.
It was a fan with a tight round shroud which is enclosed within a
rectangular box frame which you install in the ceiling drywall on the top
floor of a house where the heat gets too great in the summer. You open the
inside winter flap and turn on the fan and it creates a vacuum which forces
the air up into the attic and out through the vents in the roof.
I have already installed a ceiling fan in the area I want to install it in
and it did nothing, so I need to try the big guns. Now the squirrels have
left, anybody got any idea what I'm talking about. A name is a good start,
as would be any info source. I also have to be concerned about whether or
not I have sufficient vents on the roof to accommodate such a pump.
Like wholehousefan.com; ah, thank you, Before you go too far, do you think
I'd need extra exhaust vents on the roof. Its on a recent top floor
addition not original to the house. I am unlikely to patch the hole in the
drywall now, but am equally unlikely to solve the answer to this question
myself, but I don't know if this could be a(nother) disaster.
ya, and these are expensive. Ducting, motorization, remote control. I hope
I can get one from the BORG for a fraction and do the opening, closing,
housings myself - for just the 2 upper floor (small) bedrooms, where I'll
put it right at the top of 9 stairs- I think I have 2 roof vents up there.
I've got to ask a question now a see a snag.
under the lightly bolded heading
Use "H" Brackets To Provide Proper Support
at the same site above
The site says to put the fan above the truss, but I probably only have room
to put it below since it is at the edge of the sloping roof.
And my truss is in the middle of the the 34" wide hallwall (ceiling at the
top of the stairs), so its above or below.
I can see putting the fan at the roof level, and anything closer to the
house may not vacuum air out, but pull attic air in. Anybody see a problem
mounting the 6-1/2" housing sticking a couple inches into the ceiling form
above, rather than mounted above the truss? If its the same side walls,
does it theoretically matter?
Yes I just counted 2 screened roof vents, but exactly 1/3 of the soffit
panel area is of the perforated type too, so theres lots of venting, weather
it flows or not is another story.
Looks like I'll definitely be doing this, when I find a homedepot.com
version of the fan/shroud/shutters up here.
But I am really perplexed for the design b/c my inside ceiling, the attic
volume, the vented soffit, the roof, and where I'll mount some sort of
casing are all within an arms reach. I don't want to do it all and find out
it doesn't do anything.
There are 2 bedrooms on this top floor, and at hotter times you can feel the
heat rise as you go up step by step. Round off a full degree per step when
its hot!! I have big windows in both rooms on either side of the hallway.
[Even] if just this upper floor gets cooled (fully flushed by cooler outdoor
air) I'll be happy. But I don't know what to think.
The hallway is 34" wide (maybe a code thing). Right at wall at the top of
the stairs the roof slopes backwards, the outside is just through the wall.
And there is only one 2x6" joist/truss right in the middle of the 34" (and
16" each way), but the ceiling drywall is not flush with it - theres a full
4" in between (insides) them.
I can see why I would like to create a vacuum air pump at the ceiling level,
as opposed to through the ceiling with box walls right up to through the
roof b/c not only can I exhaust the hot inside environment air out, but also
force the hot attic air out. I do not want to draw hot(ter) attic ari in
though. I know I will be opening windows. But as far as creating the
vacuum pump action at the ceiling level goes, I am worried about having too
much open ventilation, as opossed to not enough, especially since I will see
sunlight through the vented soffit on the blades of the fan!
This whole house fan method relies on cooler outdoor air at night and open
windows. When it gets really hot, the main level does get air-conditioning,
and the basement is naturally cooler. If possible I want to have a design
that will allow me to benefit from this fact also. There is already a
ceiling fan on the same ceiling closer to the lower steps.
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