On Thu, 5 Jun 2014 09:49:17 -0700 (PDT), trader_4
wrote:
On Wednesday, June 4, 2014 9:45:24 PM UTC-4, Ashton Crusher wrote:
On Tue, 3 Jun 2014 09:48:31 -0700 (PDT), trader_4
wrote:
On Tuesday, June 3, 2014 12:13:28 PM UTC-4, wrote:
On Tuesday, June 3, 2014 8:21:28 AM UTC-7, trader_4 wrote:
On Tuesday, June 3, 2014 10:53:33 AM UTC-4, wrote:
On Friday, June 26, 2009 12:12:35 PM UTC-4, Christopher Nelson wrote:
I have a room that never seems to get enough heat or AC. I have a
split level. The furnace is below the family room and the cold/hot
room is above the family room. You'd think that'd be a short-ish run
of duct work but it does bend a couple of times. I'm thinking of
putting a booster fan like http://www.comfortgurus.com/product_...roducts_id/563
in. Do they work? Any comments on the brand or model I should be
aware of? I'd rather walk into my h/w store or home center and go
home with one but I can't find one locally. Is that to be expected or
have I just looked in the wrong places?
my house if very old i can only fit a 9 inch duct upstairs, in the summer temps would never go under 76 77 degrees i talked to 4 hvac specialist they all said it would cost over 4000 dollars to fix the issue. well i decided to try something a little different i used a 10 centrifugal fan pumping 1100cfm used an ribu1c which is just a relay powered of the thermaustat and just like that problem fixed my temps now hover at 68 plus the fan is whisper quiet. dont listen to these hvac people all they wanna sell you is an expensive piece of tin metal, my setup has been running for 2 years now no issues and also have installed it on 4 friends systems with no issues
Do you have a link to the blower you added? There are
various types. I added one of the squirrel cage ones where
you cut a hole in the bottom of a rectangular duct. I thought
it helped, but years later I bought one of the air flow measurement
instruments and measured the air flow with it on and off and there
was virtually no difference. I think it may depend on what kind
of blower you install.
Here's some links to some duct booster fans sold at Home Depot:
http://www.homedepot.com/s/duct%2520...2520fan?NCNI-5
http://www.homedepot.com/p/Suncourt-...6GTP/202797339
http://www.homedepot.com/p/Suncourt-...B208/100080191
http://www.homedepot.com/p/Suncourt-...B205/202797334
If you have an account at Grainger, they also sell duct booster fans:
Squirrel cage type:
http://www.grainger.com/product/TJER...724?s_pp=false
That last one is the type I installed. Per my airflow
readings, it didn't do anything. IDK about the other
type, but this squirrel cage is useless.
Where were you taking the airflow readings?? If it was down in the
ducts near the main fan I would not expect you would see much
difference with or without the booster. The booster isn't to make the
system move more air, it's to case the way the air gets distributed to
change so more comes out where you put the booster in. Less will come
out somewhere else but at least you will have a more even distribution
so the whole house gets to the same temp instead of one part too
hot/cool.
I took the measurements at the 4 registers that put out the air from
the rectangular duct where the booster fan was installed, which is the
only logical place to take them. No significant difference at all.
Is it possible there were a lot of leaking joints in the ducts between
where you put the blower and the outlets? I'm surprised it didn't
work a lot better. Only other thing I can think of is that there is a
really significant restriction somewhere in the duct system back of
where you put the booster and it's just not going to let air thru.