Author Topic: Whole House Attic Fans ??  (Read 9174 times)

Timothy

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Re: Whole House Attic Fans ??
« Reply #10 on: October 21, 2016, 09:48:52 AM »
Two cents...

If you have power in the attic you don't have to snake wire.  Use an available gang box to run wire to the fan switch and electrical circuit.  Wouldn't hurt to upgrade to a twenty amp breaker to the attic either! 

You can do all of that, it's easy, peasy!

MikeBjerum

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Re: Whole House Attic Fans ??
« Reply #11 on: October 21, 2016, 12:34:04 PM »
You are on the right track.  Also, put controlled louvers at the opposite end of the attic, and a set of controlled louvers in a central area of your living area.

During times of comfortable outdoor Temps you run the fan and draw air through your living space.  During high Temps you draw air only through the attic and leave conditioned air in the living space.
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Solus

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Re: Whole House Attic Fans ??
« Reply #12 on: October 21, 2016, 12:38:16 PM »
The reason you don't see them in your area is because they lower indoor air pressure and suck in dust like a vacuum.
Seems like a good idea bow, but Mrs Bill will not thank you.

The trick here is to let your house get dustier than the outside.   Then installing and using the attic fan will be an aid in  house cleaning.

 ;D ;D
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TAB

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Re: Whole House Attic Fans ??
« Reply #13 on: October 21, 2016, 01:39:07 PM »
they can help a bunch, but only if you have enough openings to get proper air flow.


air has to come in if its going to come out.
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Re: Whole House Attic Fans ??
« Reply #14 on: October 21, 2016, 07:38:23 PM »
The trick here is to let your house get dustier than the outside.   Then installing and using the attic fan will be an aid in  house cleaning.

 ;D ;D

That sounds like my house. I track dirt outside.   ;)
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Re: Whole House Attic Fans ??
« Reply #15 on: Today at 01:33:49 AM »

billt

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Re: Whole House Attic Fans ??
« Reply #15 on: October 22, 2016, 04:40:13 AM »
This model looks pretty rugged. My thinking on this, is that any and all of these things are only as good as the motor in them. The rest is basically nothing but sheet metal. So if you get a Dayton motor with good bearings, or something similar, the unit should be good to go.

The biggest problem is heat. This thing is only going to be run when it has 120F+ degree air blowing over it. So it's essential the motor be able to live in that kind of environment, or else it's going to die quickly. The motors in all of these high output electric powered cooling fans so many of the new cars now use, have to exist in similar environments, so they do exist.

I'm just assuming all of these things are designed to blow "out". But if they don't are electric motors reversible depending on how they're wired?

http://www.ecomfort.com/QuietCool-AFG-PRO-3.0/p65452.html?action=submitted#q_a

MikeBjerum

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Re: Whole House Attic Fans ??
« Reply #16 on: October 22, 2016, 07:55:54 AM »
All the barn fans, which basically what this is, that I work with are 220 and reversible, but I'm not sure about 110.  Customer service can tell you the direction.  Dayton have always been good for us, and if you have everything else with bearings, not bushings, it will run smooth, quiet, and for years.
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billt

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Re: Whole House Attic Fans ??
« Reply #17 on: October 22, 2016, 09:40:08 AM »
Dayton have always been good for us, and if you have everything else with bearings, not bushings, it will run smooth, quiet, and for years.

I have never burned out a Dayton motor in my life. I have one on an old belt driven Thumlers Tumbler I bought way back in the early 70's when I first got into reloading. I couldn't even begin to guess how many hours are on that thing. It gets hot when I run it for several hours, but it just keeps on going.

Timothy

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Re: Whole House Attic Fans ??
« Reply #18 on: October 22, 2016, 01:20:08 PM »
I used Dayton motors in several products my old employer made years ago and never had one fail while we warranted the product line.

They're not a domestic product anymore though, most are probably made in Mexico.  Grainger sells them and those I clicked on were Mexican built.  I suspect the quality isn't what it used to be in the 70's.  The Dayton plant in IL is closed now.

Most Dayton motors are reversible in their rotation.  Check the model on the fan you buy and it should show you how to reverse the polarity to run either way if it was built as a CW/CCW motor.

All three phase motors can be reversed by just reversing the red and white wires on the starter you use, at least that's my experience wiring a thousand motors over ten years.  I suspect most of those systems are still running somewhere!  We built a real tank of a portable ventilation unit..  Almost too good, they never broke so we never made any sales in the parts department!

PegLeg45

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Re: Whole House Attic Fans ??
« Reply #19 on: October 24, 2016, 10:44:13 AM »
I used Dayton motors in several products my old employer made years ago and never had one fail while we warranted the product line.

They're not a domestic product anymore though, most are probably made in Mexico.  Grainger sells them and those I clicked on were Mexican built.  I suspect the quality isn't what it used to be in the 70's.  The Dayton plant in IL is closed now.

Most Dayton motors are reversible in their rotation.  Check the model on the fan you buy and it should show you how to reverse the polarity to run either way if it was built as a CW/CCW motor.

All three phase motors can be reversed by just reversing the red and white wires on the starter you use, at least that's my experience wiring a thousand motors over ten years.  I suspect most of those systems are still running somewhere!  We built a real tank of a portable ventilation unit..  Almost too good, they never broke so we never made any sales in the parts department!

Man, if I had a dollar for every motor I've wired......... from 1/4hp single phase to 250hp three-phase.


On some single phase motors (depending on brand) the access panel on the end where the pigtail wires in has a couple of wires that are on push terminals that can be swapped to change rotation. Some have terminals with screws. I've even seen a few with provision to just remove a jumper wire to reverse rotation.
Single phase motors have two windings, the main winding and the auxilliary winding.
Reversing a single phase motor cannot be done by just reversing the polarity of the supply to the entire motor. To reverse the single phase motor, the polarity of the supply to only one of the windings needs to be changed.

You would need to check inside the wiring panel to be sure. If you don't have two pairs of wires coming from inside the motor and ending in two pairs of screws (or other connection types), and sometimes one  is in series with a capacitor, you will NOT be able to reverse direction.

Most of the motors I've dealt with plainly stated on the motor plate if it was easily reversible or not.
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