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Vacuum cooler question.
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I second the suggestion for the bathroom fan option and sucking rather than blowing so you aren't chasing beans all over the place.
You can dissipate the heat by having a not fully enclosed setup below the fan.
My cooler uses a repurposed vacuum cleaner motor inside a bucket with a colander on the top.
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I haven't found this.Originally posted by Yelta View Post
My cooling fan (as do most) draws the air down through the beans, would be roasted coffee all over the area if you had an up flow of air.

Roaster Cooler
My fan_in_a_box flow upwards and apart from a bit of chaff nothing blows out.
The fan is a $20 Arlec extractor fan from the big green shed. The sieve came from a $2 shop.
Seems to cool a half kilo roast quite well.Last edited by Lyrebird; 1 September 2018, 02:04 PM.
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Check out my cooler made from an old pop corn stir, bucket and strainer pan. Cools quickly.
https://www.youtube.com/watch?v=NYzh4kCqcJU
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You got 20kg of mayo for $3? Bargain!Originally posted by Yelta View PostHere's my cooler.
20 litre mayonnaise bucket $3, bathroom $20 extractor fan mounted on the bottom, sieve on top, the whole thing mounted in an old aquarium stand.
Simple, very efficient , cheap, easy to make and almost silent.
The fan is to blow the chaff from the roaster out the door, plays no part in cooling.
Cools a 725 gram batch ready to bag in about 45 seconds.
[ATTACH=CONFIG]19388[/ATTACH]
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Does the exhaust fan suck the hot air off through the bottom or blow cool air up through the beans?Originally posted by greenman View PostThis is my version for quick cooling my roasts, I used an old metal TV trolley, the cooling tray on top was the lower shelf which I modded, a kitchen/bathroom exhaust fan does the cooling, when finished I wheel it back under the bench for next time!
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I’ve made a similar setup using an old stockpot and it works great!
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Here's my cooler.
20 litre mayonnaise bucket $3, bathroom $20 extractor fan mounted on the bottom, sieve on top, the whole thing mounted in an old aquarium stand.
Simple, very efficient , cheap, easy to make and almost silent.
The fan is to blow the chaff from the roaster out the door, plays no part in cooling.
Cools a 725 gram batch ready to bag in about 45 seconds.
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I've given mine a test run today, cooled 800g in maybe 20 seconds, but it wasn't sealed up very well. Since then I've sealed it all very well and now I'm sure it will cool even the largest load, probably several KG, in 20 sec or less ;-)
I took some pics but then did mods and now it looks much cleaner... please excuse the messy shed I'm currently working with...
Above is before my final mods where I removed the barrel from the leaf blower and built a small support under the motor, and removed most of the support wires.
Above is the final version.
And below is the final layout of my "roastery".
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I have been on the look out for a cheap dust extractor since I first saw yours in action mate
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I for a while used a box with a large stainless steel colander fitted into it, beans would go into this and through a hole down lower in the box i connected flexi pipe on to a secondhand dust extractor. Also cooled in seconds. could do up to 3-4kg at once
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