return fan ...

return fan ...

PostBy: Mossy Beard On: Tue Aug 12, 2008 6:45 am

I completed my "return fan" install to help get more positive air circulation.
I used a Field 6" inline fan, connected to a 4 x 12" floor register. It is in a spare bedroom at one of the fartherest points from my stove.

Initial observations -
It moves a considerable amount of air but.....
The noise is very,very loud !

The majority of the install is "hard" duct to the basement floor. The fan is about 20" below the floor register.

Any ideas on how to quiet it down ?

I'll most likely have to shut it down while sleeping ??

Thanks, Mossy Beard
Mossy Beard
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Magnum Stoker

Re: return fan ...

PostBy: Richard S. On: Tue Aug 12, 2008 6:52 am

Can't you run a duct to the register and place the fan somewhere further away?
Richard S.
 
Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite

Re: return fan ...

PostBy: LsFarm On: Tue Aug 12, 2008 6:59 am

As Richard said, put the fan as far away from the bedroom floor register as possible.. I'd put it in the basement, near the end of the duct, just before the heat source..

I don't recommend duct fans, I prefer to use the fans on already on the stove or furnace.. They are squirrel cage fans, they move a lot of air, and make very little noise..

You may be able to add a speed controler/reostat to the duct fan, and slow it down just a little, often this is enough to make a big difference in the noise it makes. But I'd move it first, before buying more parts/pieces.

Greg L
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland


Re: return fan ...

PostBy: Devil505 On: Tue Aug 12, 2008 8:01 am

Mossy Beard wrote:Any ideas on how to quiet it down ?


I had the same problem with a 6" duct booster fan I bought at Home Depot & the fan company replaced the fan for me with a quieter one. It was a Suncourt inline duct fan model DB206. ( I guess they had a design problem with it....made a racket!)
The new one is fine & is even 2 speed!

In any case, I would contact the fan company & see if they will replace it.
Devil505
 
Stove/Furnace Make: Harman
Stove/Furnace Model: TLC-2000

Re: return fan ...

PostBy: Adamiscold On: Tue Aug 12, 2008 9:13 am

LsFarm wrote:A
They are squirrel cage fans, they move a lot of air, and make very little noise..

Greg L


Is there a way to connect a squirrel cage fan to a heating duct? How would it draw heated air from a stove through the duct to the vent? Is it even possible?
Adamiscold
 
Stove/Furnace Make: Chubby Sr. Old School

Re: return fan ...

PostBy: Mossy Beard On: Tue Aug 12, 2008 1:05 pm

I followed the mfg. instructions to "mount the fan as close as possible to the problem area" :? I also listened to the Vendors same suggestion.
Looking back that may be the best for performance but does little for your ears ?
I guess I'll be moving the fan :(
I used hard duct for the insatllation ; I don't know if "flex" would have been better ? ( noise)

Mossy Beard
Mossy Beard
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Magnum Stoker

Re: return fan ...

PostBy: Adamiscold On: Wed Aug 13, 2008 9:40 am

I used hard duct for the installation ; I don't know if "flex" would have been better ? ( noise)



I think hard duct is going to give you a better air flow with less restrictions then a flex duct would. You can always try insulating the duct work to not only help with the sound but to help keep what temperature the air is at in the duct consistent throughout the length of the duct.
Adamiscold
 
Stove/Furnace Make: Chubby Sr. Old School

Re: return fan ...

PostBy: Mossy Beard On: Thu Aug 14, 2008 6:44 am

I moved the fan farther away from the floor register.
I have to pick up some flex this weekend. Then I'm going to make a flex transition boot to connect to the register. I'll keep the fan some distance away in the hard pipe and see what happens.

Mossy Beard
Mossy Beard
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Magnum Stoker

Re: return fan ...

PostBy: WNY On: Thu Aug 14, 2008 7:31 am

Yes, In line fans are very noisey and tranfers the sound throughout the pipe. Flex would help in the noise, but also reduce the velocity.

I think they make the rubber adapter transistion pieces, you can put one on each end of the fan housing to connect the pipe, that will not transfer the noise generated by the fan to the pipes. Something like attached.
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[nepafile=5382]coupling.gif[/nepafile]
WNY
 
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker, LL & CoalTrol
Stove/Furnace Model: 90K, Hyfire I, VF3000 Soon

Re: return fan ...

PostBy: Adamiscold On: Thu Aug 14, 2008 10:21 am

Great idea Dave, the rubber would be sure to absorb the noise and vibrations from the fan without sacrificing the amount of air being moved through the rigid duct work.
Adamiscold
 
Stove/Furnace Make: Chubby Sr. Old School