Shop Fans
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Admom
Joined: Feb 2001
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From: Silver Springs
Shop Fans
Hey Guys -
We're putting up a new red-iron metal building. The peak will be 18' high and we want to put a built-in fan at the front and rear gable to help with the heat.
1st - where can we find these fans and what brand should we go with? I've looked online and maybe I just don't know what it is I'm looking for.
2nd - to make them the most effective, should both fans be turned out or one pushing the air and the other pulling it out?
Thanks.
We're putting up a new red-iron metal building. The peak will be 18' high and we want to put a built-in fan at the front and rear gable to help with the heat.
1st - where can we find these fans and what brand should we go with? I've looked online and maybe I just don't know what it is I'm looking for.
2nd - to make them the most effective, should both fans be turned out or one pushing the air and the other pulling it out?
Thanks.
Posting Legend
Joined: Sep 2001
Posts: 30,255
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Use a whole house fan turned on it's side blowing out at each end. Open the doors WIDE. 
They come with louvers also to hold a little heat in the winter but you will need a screen on the outlet also to keep critters out. Put a screen with smaller mesh over the inlet to catch junk.
How to seal them against rain is something else.
Any Home Box store will have them. Choose the size that fits.
There is an old post here by me that has how to make a roll-around shop fan to keep the skeeters at bay. https://www.ford-trucks.com/forums/s...ead.php?t=4783
They come with louvers also to hold a little heat in the winter but you will need a screen on the outlet also to keep critters out. Put a screen with smaller mesh over the inlet to catch junk.
How to seal them against rain is something else.
Any Home Box store will have them. Choose the size that fits.
There is an old post here by me that has how to make a roll-around shop fan to keep the skeeters at bay. https://www.ford-trucks.com/forums/s...ead.php?t=4783
Hotshot
Joined: Jun 2003
Posts: 12,343
Likes: 4,368
From: SW VA
We have one of those industrial grade fans...about 25-28 inches in diameter. That thing blew the fitted cover off of my dads motorcycle that was sitting 25' away. Sorry, I cant help you with a name of it...dosent have one on it. My mom got it from her job for free...they were about to throw it out because of a loose wire.
Elder User
Joined: Feb 2003
Posts: 586
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From: Tottenham Ontario Canada
These fans are very commonly used in livestock barns, and are generally designed to blow out. Take a trip to a farm supply store and have a look.
Any fan can only pull out of a building what leaks and poor weatherstripping let in. Unless, of course you have a door or window open. If you use the fan only to control heat build-up, leave the door open a few inches and install the fan blowing out at the far end. Alternatively, a louvered vent at the end opposite the fan will provide the air intake, and the cross-flow will effectively vent the hot air. You may have to close the vent and the fan in the winter if you want to keep any heat in the building.
Cheers,
Eric
Any fan can only pull out of a building what leaks and poor weatherstripping let in. Unless, of course you have a door or window open. If you use the fan only to control heat build-up, leave the door open a few inches and install the fan blowing out at the far end. Alternatively, a louvered vent at the end opposite the fan will provide the air intake, and the cross-flow will effectively vent the hot air. You may have to close the vent and the fan in the winter if you want to keep any heat in the building.
Cheers,
Eric
Last edited by eehoepp; Jun 23, 2004 at 04:04 PM.
Postmaster
Joined: Aug 2003
Posts: 2,977
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From: South Texas
I have a couple of old central air blowers. They work really well, but they need to be placed high away from moving body parts (if you want to keep them). You can also make a screened box to keep the blades from being a hazard.
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Admom
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Posting Guru
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From: Oregon
At one of the shops at work I installed a couple fans up high to take care of the heat. I also installed one about 8' up the wall, opposite one of the overhead doors. This one blows in. This lower one probably gets the most use. Any time we do any grinding, welding, light painting, ect - We open the door and the dust gets blown outside. Plus, it's nice to have a breeze sometimes. I built an insulated door on the thing. Close it when the fan's not in use. turn the fan on and the door opens automatically. Kind of fun...
A number of years ago we built a 40x60 freezer panel building. Walls and ceiling are rated R40. There's a bunch of elecronic equipment running in there all the time and it gets warm. We put a 5 ton A/C unit in. I'd collected an electric louver and fan from other jobs, so I installed each under opposing eves. I set it up where at 70 deg the louver opens. At 80 deg the opposing fan turns on, unless the outside temp is over 85 deg. Then they both turn off and the A/C turns on.
A place to check out - click on HVAC, then fans:
http://www.grainger.com
A number of years ago we built a 40x60 freezer panel building. Walls and ceiling are rated R40. There's a bunch of elecronic equipment running in there all the time and it gets warm. We put a 5 ton A/C unit in. I'd collected an electric louver and fan from other jobs, so I installed each under opposing eves. I set it up where at 70 deg the louver opens. At 80 deg the opposing fan turns on, unless the outside temp is over 85 deg. Then they both turn off and the A/C turns on.
A place to check out - click on HVAC, then fans:
http://www.grainger.com
New User
Joined: Jun 2004
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You can also checkout www.cesco.com They have about 200 stores around the country, and sell every thing industrial electric. I would install one fan on the cool side of the building away from the sun to pull cool air in. And the other on the hot side blowing the air out. I used an old lawn mower with a squirrel cage fan and a small livestock mister for a portable swamp cooler. It works great! You can't even feel the moisture it puts out. But you can feel a lot of cold air.
Clay
Clay
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