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Home Brew Forums > Home Brewing Beer > DIY Projects > Fermenters > Fermentation Chamber built with window A/C unit
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Old 03-28-2012, 11:42 PM   #11
AtomicGecko
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I'm actually doing a super simple controller for my first version. I am using an MSP430G2231 with a built in temp sensor, a basic relay driver chip, and a 12v relay to bypass my AC unit's mechanical relay. All told it'll cost <$10, programmer included
Do you have instructions on how you did this? I'm going to use an old 3 door Continental Reach-in Fridge that doesn't work. Since I don't have the tools or expertise to fix/replace the compressor an easy route to go may be to just cut a hole and use a window A/C.


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Old 03-29-2012, 03:17 AM   #12
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If you're building a large ferment chamber the A/C is the way to go. I've been running an AC to cool my 15 gal conical for the last few years. I just have a box with 1" EPS foam insulating it. It's not well constructed, nor well sealed, but it will get the chamber down below 10F regardless of ambient conditions. The coil does freeze up when it's humid and I try to do anything below ale temps, but that can be managed with good sealing and control scheme. I've just been too lazy to bother with those things.


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Old 07-16-2012, 04:22 PM   #13
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Originally Posted by JKoravos View Post
If you're building a large ferment chamber the A/C is the way to go. I've been running an AC to cool my 15 gal conical for the last few years. I just have a box with 1" EPS foam insulating it. It's not well constructed, nor well sealed, but it will get the chamber down below 10F regardless of ambient conditions. The coil does freeze up when it's humid and I try to do anything below ale temps, but that can be managed with good sealing and control scheme. I've just been too lazy to bother with those things.


i would love to see some pics of your build!!
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Old 06-08-2015, 07:13 PM   #14
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My Fermentation Chamber
...
Let me know if you have more questions. I love mine, it just needs more insulation.
Update: This was been completely dismantled and replaced with a proper upright refrigerator. It started to grow mold because there was no way to ensure that the insulated panels were airtight. The warm humid air lead to condensation inside the panels and before I could see it from the outside, the panels were filled with black mold (of death). See Failed Experiments.
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Old 07-21-2015, 10:16 PM   #15
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So i just finished building my .. sort of ugly fermentation and conditioning chamber.

its 28 inches Wide by 25 inches (with a 24 Wide x4 entry way part) by 7 feet high.

I'm not the best with wood working but its .. okay looking. someone posted a MUCH better looking one on here.

anywho AC unit was $35 on craigs and i spent $50 ish on lumber. need to buy 1 last stick of 2x2 so i can rest the shelves . bottom chamber is 30" tall, middle is 40" and the top is like 18"

Fermentor (SS Bucket) will go in the middle chamber,

I bottle, so i figure i would stick Carbing bottles in the top or middle , and move them to the bottom after 2 weeks to let them "age/condition"

so granted there's almost no thermal mass in there right now. my empty SS bucket and 3 cases of empties but my 24 hour thermometer seems to be showing 62-70 as the range. temp is set to 70 .. Maybe the AC unit is too strong? I believe i have it set on economy power saver mode. maybe low would result in better temp resolution. also the AC unit is at the very top and i don't have a top shelf in there yet. and my doors have not been insulated yet either...

sounds like i should try to glue something mold proof on the inside or maybe find a spray / paint that is mold proof / washable ??

so i cut that 2x2 stick that's in the photo , there's now a small beam behind the intersection of the top and middle doors, and a 2nd one behind the intersection of the middle and bottom doors.

i also used magnetic catches so that the doors stay air tight (in theory) was gonna glue insulation to the doors as well but now i'm thinking a spray on might be better.

maybe i'll brew a batch this weekend and try out the cabinet.


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