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ag4life

Posted 9/1/2024 09:12 (#10874487)
Subject: shop/warehouse ceiling fan

Southern Illinois

The heat the last few weeks has been rough, so I am going to be ready for next summer. I currently run a 42" fan and a 24" on a pedestal. Warehouse is a 60x80x16 with no insulation but lots of windows and one end has several doors. Borrowed a 60" fan for a meeting and it helped a ton, but was too noisy and $1000 to buy one. That got me thinking about a ceiling fan. I don't have room under the trusses but I can fit a 9 or 10' down the center just above the truss so I don't lose any height.

My question is will a big ceiling fan be better than floor fans? Big Ass Fans are way out of my price range, but looks like for $500-1000 you can get a decent ceiling fan that moves similar CFM to the 60" barrel fan.

The part I am concerned about is not having insulation on the roof and it may just move the hot air from the attic area around. Anyone have any experiences?

I have customers with insulated barns and the big ceiling fans are unbelievable. The Big Ass fan he has is probably 18' and it feels like he has AC.

junk fun

Posted 9/1/2024 09:42 (#10874522 - in reply to #10874487)
Subject: RE: shop/warehouse ceiling fan

Wisconsin

Are the doors open too much to consider A/C? The heat near the roof is one thing you're fighting, the other is the floor slab being cooler since it's connected to the earth underneath, even if you have 2" of foam, but most don't.

ag4life

Posted 9/1/2024 09:45 (#10874525 - in reply to #10874522)
Subject: RE: shop/warehouse ceiling fan

Southern Illinois

We had a temporary ac/cooling units put in for a meeting a few years ago. Ran it hard the day and night before. By noon it was cooler than outside but not by much. Electric bill was nuts.

Not having insulation is the killer. Could have foamed the whole thing for 15k when I built it in 2017. Now it costs more than that just for the roof line.

junk fun

Posted 9/1/2024 10:33 (#10874581 - in reply to #10874525)
Subject: RE: shop/warehouse ceiling fan

Wisconsin

I'm not in southern IL so take it for what it's worth. If I could close up a building like that and run a smaller reasonably efficient AC, the cool air would stay near the floor, and the heat from the roof would stay near the roof. If you can keep the doors mostly closed, then the air won't change as fast as it would in the winter when the hot would run out the top and the cold would flow in at the floor. The top of the shed would already be hot so the density to drive the flow isn't as great.

That doesn't take into account if you're running forklifts inside, or you have east and west windows, or where the people are working inside, or any number of other factors. Here, A/C is nice for dropping the temp a few degrees, but lowering the humidity is the real life saver.

DBindiana

Posted 9/1/2024 10:57 (#10874622 - in reply to #10874487)
Subject: RE: shop/warehouse ceiling fan

West Central Indiana

When I put up my new shop in 21 I put 3 ceiling fans in a row in the center of my shop. Thought it would really help. I learned really fast that all they did in summertime was blow all the hot air that was at the ceiling down and made it hotter. I have tube heat and in the wintertime I now leave one of them on all the time if the heats on and it really helps.

ag4life

Posted 9/1/2024 10:58 (#10874625 - in reply to #10874622)
Subject: RE: shop/warehouse ceiling fan

Southern Illinois

That's what I was afraid of. Thanks

farmerbk

Posted 9/1/2024 11:59 (#10874695 - in reply to #10874487)
Subject: fwiw....

Seymour, IL

putting a ceiling in, even with no insulation would help.
our shop building is 60x72x16... I have had good success with wall mounted fans... about 2 feet above the windows. they are 24 inch fans, and I leave them on all the time.

i do run 2- 120V window AC... as has been noted, they help alot with the humidity. like the fans, I start them and they run all season.
hope this helps.
bryon

ag4life

Posted 9/1/2024 12:13 (#10874713 - in reply to #10874695)
Subject: RE: fwiw....

Southern Illinois

I only have about 3 inches of clearance from the top of the boxes to the truss. No room for a ceiling. Major miscalculated on my part.

Aaron SEIA

Posted 9/1/2024 12:19 (#10874727 - in reply to #10874713)
Subject: RE: fwiw....

Buy a couple of used furnaces and some duct work off of Facebook Marketplace and have them blowing some air around.
AaronSEIA

Greg K

Posted 9/1/2024 13:01 (#10874780 - in reply to #10874487)
Subject: RE: shop/warehouse ceiling fan

Can you put a exhaust fan on the gable end of the roof to pull the hot air by the roof out of the building? Perhaps like a hog barn fan or an attic exhaust fan.

tommyw-5088

Posted 9/1/2024 13:56 (#10874828 - in reply to #10874780)
Subject: RE: shop/warehouse ceiling fan

Texas

Some of those big blue fans that sit on the floor help .

That is what we had and it did help .

We worked on trucks in a shop pointing east and west . It was dang hot but they made a difference. They beat nothing real bad .

WCWI

Posted 9/1/2024 21:46 (#10875305 - in reply to #10874780)
Subject: RE: shop/warehouse ceiling fan

Greg K - 9/1/2024 13:01

Can you put a exhaust fan on the gable end of the roof to pull the hot air by the roof out of the building? Perhaps like a hog barn fan or an attic exhaust fan.

Here is where my mind was going, we put an exhaust fan in the bell tower of our church to pull out the hot air from the top of the sanctuary, did help alot then run ceiling fans to move air, but they need to move enough air with them to feel a draft or they do not help much . We also had a 20 inch barn fan in the peak of our roundroof dairy barn at home, helped some and when you were piling in the peak you could feel a bit of a breeze, still hot but definitely helped.

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