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Discussion Starter #1
Does anybody have any experience with exhaust fans mounted on top of bins to aid in aeration? I see there are some on the market.
Specifically I would like to try them on our cooling hopper bins. We dump hot out of the dryer into these bins, and always have condensation issues... maybe exhausting from the top would help?
 

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Does anybody have any experience with exhaust fans mounted on top of bins to aid in aeration? I see there are some on the market.
Specifically I would like to try them on our cooling hopper bins. We dump hot out of the dryer into these bins, and always have condensation issues... maybe exhausting from the top would help?
I was thinking if the same thing for the same reasons as you. Where did you find the powered exhaust vents.
 

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We dump hot out of the dryer into these bins, and always have condensation issues... maybe exhausting from the top would help?
For this I have heard it is much better to actually have the fan blowing into the roof of the bin to dilute the humid air.
 

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We are in the process of fitting 12” aeration fans in the top of the drags to help with condensation in the bins. Will post pictures as soon as we are done. We also have a fan in the distributor to help as well.
 

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Discussion Starter #7
For this I have heard it is much better to actually have the fan blowing into the roof of the bin to dilute the humid air.
I’ve heard that before as well, but I just assumed the guy misspoke because I can’t wrap my head around how that would help.
 

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I’ve heard that before as well, but I just assumed the guy misspoke because I can’t wrap my head around how that would help.
The guy that told me this is a member here and he ran the fan discharging from the roof first while dumping hot corn into large flat bottom bins. When that was not satisfactory he flipped it around and said it was a big improvement. This was a few years ago and I think I recall properly.

My guess is that when the fan is set to discharge then it simply can't keep up to the larger fan on the bin bottom and the other side of the bin always has humid air, whereas if it is pumping a stream of cool dry air from the outside then it is keeping the air inside diluted of the hot/humid air from the hot grain. Obviously you will need adequate roof vents to do this. His roof fan was mounted at the lower end of a roof panel.
 

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Discussion Starter #10
The guy that told me this is a member here
Funny you say that. The guy that told me about blowing in instead of exhausting told me that he read it on the combine forum. I tried searching for the past thread without success.
 

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Funny you say that. The guy that told me about blowing in instead of exhausting told me that he read it on the combine forum. I tried searching for the past thread without success.
I find the search function on here to be very questionable. Almost better to just do a google search and use Combine forum in your query. Unless I am missing something? Almost should have a thread on how to use this forum. One tip that I feel like most people don't know about is to change to 40 posts per page in your settings, makes it way more usable.
 

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If your dumping hot corn your best off buying larger fan and suckin the air out of the bin, make sure the bin has extra roof vents this actually blows the humid air out of the bin, we have had great succes in our steeping bin and have no more issues with corn sticking to the wall, but like i said need a lot of roof vents and double the hp on the fan, went from 5 to a reversed 10, we still empty hot bin and move to final storage
 

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We are in the process of fitting 12” aeration fans in the top of the drags to help with condensation in the bins. Will post pictures as soon as we are done. We also have a fan in the distributor to help as well.
I suspect that pulling the air through your conveyor will just cause the moisture to accumulate in the conveyor as well. I hope this plan is working for you.
 

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Discussion Starter #15
We installed bin exhaust fans on our steeping bins before corn harvest.
They certainly helped...I’m a little disappointed, but an improvement for sure.
This drying season was so cold any condensation that made it near the sidewalls of the cone would freeze. So I am expecting much better results in a move typical drying season.
 
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