Your experience and mine differ a lot. My townhouse was built with
afull width soffitt vent in front and in back, 6 or 8" wide and covered
with vinyl window screening. Plus a ridge vent that goes almost to each
end of the ridge.
Yet when I got home from work on summer evenings, it was too hot to go
upstairs and even at 10 or 11 it was too hot to sleep there. I slept
in the basement and went upstairs the next morning to shower and get new
After I put the fan in, it was warm upstairs, sometimes very warm, but
always tolerable, always sleepable. Maybe with a little table fan on
the window sill pointed at me. (Very little, just 2 blades with a
motor just like but one size smaller than the motor in most bathroom
Perhaps you noticed no other benefit because you had the AC on and it
cooled the 2nd floor whether you had a fan or not. Becaue I don't use AC
except when it's overwhelmingly hot, the effect of the fan was clear.
The previous owner added insulation that the builder hadn't and I added
more yet, and probably should have added even more, and if there were a
perfect heat barrier between attic and second floor, the second floor
would not have been hot even without a fan. I also compressed the
insulation in the middle of the attic by laying plywood to walk on,
while I put in phone, TV, alarm, and electric wires. But insulation
just slows down heat travel, it doesn't stop it. And the fan keeps the
attic from getting more than a couple degrees above the outside temp, in
the 80's, 90's or low 100's. Without the fan, the temp in the attic,
even with soffitt and ridge vents, could get to 140 iirc or maybe it was
I probably could have measured how much electricity the fan used but I
didn't. Or I could take the amperage and number of hours it runs and
On Tuesday, May 26, 2015 at 10:18:09 AM UTC-4, micky wrote:
Yet, I believe in this thread you told us that you only have 6" of
insulation? And if that's true, then the real source of your heat
problem is inadequate insulation, which is killing you in winter too.
and if there were a
I call baloney on that one. Anyone else here ever see an attic
where the temp is only a couple degrees above outside when it's
80-100 outside, regardless of how it's vented? Typically venting
may allow it to be 110 or 115 instead of 125 or 130F. But just
a few degrees difference? There is a lot of
unique things going on in your world Micky. I know, I'm just
supposed to take your word for it, not question it, etc.
Without the fan, the temp in the attic,
You have the fan and the ridge vent too? Probably pulling air
from the ridge vent, into the fan, and right back out.
On Tue, 26 May 2015 07:45:46 -0700 (PDT), trader_4
I woudl be worried about that myself, except I know there is a lot of
air coming in the soffitt vents. They get covered with milkweed
seeds, along the entire width of the house, and have to be cleaned off
every few years. That wouldn't happen if there were just passive air
flow through them,
One of the milkweed trees died last year, but I noticed a small amount
of the seeds in the air yesterday. I'm hoping that's from a tree much
farther away, and the soffitts don't have to be cleaned as often.
if you can get by with a passive vent do that instead.
that avoids a lot of expense. which depends a great deal
upon the space and the heat gain and moisture levels, soffit
vents, etc, but well worth the effort.
if you do end up replacing the motor get one that
is the most efficient you can afford. some cheap ass
motors will use a lot of energy that can be saved
otherwise. the price difference will pay for itself
many times over the years.
Consider buying the same make and model motor as what you have now. It
seems to have lasted a long time.
If there is no motor store near you, or you want to save maybe 20%,
(that's what I would have saved) check out :
They may have "Product cross reference" in case your model isn't made
If they don't, www.fasco.com certainly does have a cross reference, that
will give you a Fasco model, and they are good quality.
I bought my previous motor from EMR, which is a quality outlet and
doesn't sell junk, and it lasted 13 years. I'm not suggesting them for
you, because their wholesalers may all be near Baltimore.
My particular motor, the same model that I bought last time, I paid 120
yesterday but could have gotten it online at http://www.emotorstore.com/
for 80, plus 14 for shipping.
The Fasco website also has a list of local distrutors. There were about
20 within 20 miles of my house. The three I called didn't have my model
in stock, but they could all get it in a day or two. I had already
talked to another place on the list, that's named after motors, and
that's where I bought it.
On Wednesday, May 13, 2015 at 9:27:13 PM UTC-5, TimR wrote:
When mine died a few years ago an electrician wanted over $500 to replace it. I called the manufacturer and they simply shipped me a new one at no cost, which I installed myself. Might be worth checking who made yours and making a call.
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