Thermoelectric wine cooler drying and curing - DIY

taproot

Well-Known Member
You won't need a dehu in a compressor fridge as the action of the compressor does all the work for you, the problem is it works too well and you can't control the humidity independent of the temperature, the people who do lotus usually put the bud in some sort of porous container, pizza box, paper bag etc, or in jars and periodically burp them.
Right, this is why I was wondering if putting bud in a groove bag in the fridge would work. The bags say they have a breathable membrane. Think I'll try a few buds next time.

My main two concerns is my summers are hot..it was 105F today. So the thermo's might have a issue. Second, how well do these peltier fridges hold up..it seems like they crap out way faster than a compressor based fridge.

I really want to try both so I'm looking on FB and CL for them.
 

Hook Daddy

Well-Known Member
Right, this is why I was wondering if putting bud in a groove bag in the fridge would work. The bags say they have a breathable membrane. Think I'll try a few buds next time.

My main two concerns is my summers are hot..it was 105F today. So the thermo's might have a issue. Second, how well do these peltier fridges hold up..it seems like they crap out way faster than a compressor based fridge.

I really want to try both so I'm looking on FB and CL for them.
Just putting the bud direct into a grove bag will not work, at least according to the grove bag directions. The buds must be dried properly first, then into the bags. They will allow humidity in to a certain point to keep the buds at a curing humidity, but they are not for drying. In a compressor fridge you use pizza boxes, paper bags, something that will hold some humidity in so they don’t dry too fast. There’s a bunch of threads on it, try googling drying in a fridge or the lotus cure.
 

taproot

Well-Known Member
Just putting the bud direct into a grove bag will not work, at least according to the grove bag directions. The buds must be dried properly first, then into the bags. They will allow humidity in to a certain point to keep the buds at a curing humidity, but they are not for drying. In a compressor fridge you use pizza boxes, paper bags, something that will hold some humidity in so they don’t dry too fast. There’s a bunch of threads on it, try googling drying in a fridge or the lotus cure.
I get it..just wanted to try it. I didn't plan on chopping and throwing right in there...probably let dry for 24/48 hours first depending on outside temp.
 

Blue brother

Well-Known Member
Right, this is why I was wondering if putting bud in a groove bag in the fridge would work. The bags say they have a breathable membrane. Think I'll try a few buds next time.

My main two concerns is my summers are hot..it was 105F today. So the thermo's might have a issue. Second, how well do these peltier fridges hold up..it seems like they crap out way faster than a compressor based fridge.

I really want to try both so I'm looking on FB and CL for them.
It doesn't work haha I tried it, the pore size of their membrane is sized to work at higher temperatures. Good on u for thinking it though, seems we were wondering the same thing. That's what's got me tinkering with ptfe, hiring a material scientist is expensive though and there's a lot of trial and error with expensive product to really find a solid solution. Plus ptfe is expensive, I tried training gpt4 to be a material scientist and that did get me closer to finding the exact material. Maybe you could try too and we could exchange results?

unfortunately I don't have that problem with excessive ambient temperatures, I keep my cooler cold and I can dry at 9'c and drag it out for months if I wish.

mine has been up and running a long time now though so I wouldn't worry about the longevity, I think I built mine around 3/4 years ago and it's still going strong
 

Hook Daddy

Well-Known Member
My main two concerns is my summers are hot..it was 105F today. So the thermo's might have an issue. Second, how well do these peltier fridges hold up..it seems like they crap out way faster than a compressor based fridge.
We have been over the temp, I don’t think you’ll have a problem with that unless your running it outside or in a room that exceeds 90f, and even then it will hold temp, just maybe not 55. The cannatrol recommends running at 68, probably to avoid this discussion, and that would be easy to achieve. The longevity of the peltiers vs compressor based coolers really depends on the manufacturer and quality of the heat sinks and fans. My first one has been running about a year and a half non-stop, no problems, while my kegerator which is compressor based has been sent back for warranty repairs twice. I don’t blame the kegerator failure on the fact it’s compressor based, the manufacturer just sucks, or I got a lemon. Anyhow, I’m not really posting this to get you to change your mind, give things a try and let us know how they work. I just don’t want others reading and thinking, Oh, the coolers don’t work if the room is over 80, and off they go, so I try to stick with what’s proven, not what someone thinks might be, hope this makes sense.
 
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sgnpuflm

Active Member
I get it..just wanted to try it. I didn't plan on chopping and throwing right in there...probably let dry for 24/48 hours first depending on outside temp.
Mine held just fine with a heat index above that with a humidity level above 50% outside. If that makes you feel any better.
 

magnetik

Well-Known Member
Accidently bought a compressor unit vs thermoelectric, how screwed am I?
You're not. I have been using a compressor unit for a while. Now use in conjunction with Grove Bags feels like a perfect combo. Without the grove bags, I wasn't comfortable with the spikey nature of the temp/humidity numbers.. added the bags and it keeps everything inside the bag constant, irregardless of the compressor kicking on and off.
 

Week4@inCharge

Well-Known Member
Next I drilled the hole in the fridge. I chose lower and to the right, staying away from the power cable and any other fridge parts. It’s just thin metal and insulation. I had a half inch hole saw that was the perfect size. I cleaned up the hole so there were no sharp edges that could cut cables, the fed the sensor cable and dehumidifier power cable through. I read in other threads to be careful using silicone to seal the hole, the smell is hard to get rid of. I used hot glue, and two neoprene plugs from an old cloner I had made that I cut down to fit tight. After it was finished I think I could have skipped the hot glue all together.

Hole in the fridge from the front
View attachment 5273723

Hole from the back of the fridge with wire through. I had not taped up and protected the power for the humidifier here yet, I did that later.
View attachment 5273724

Humidifier in place. It just sets there with the fins in the channel that drains to the tray under the fridge. At first I worried about the tray filling up but it is designed to evaporate out fairly quickly, it never had more that a dozen tablespoons or so of water in it. The Inkbird sensor is next to it, I ended up mounting the sensor with hot glue to the back right of the fridge fan and between shelves where it will not touch anything including your drying flower once loaded up.

View attachment 5273726
You just gave one hell of an idea! I have a lot of them neoprene plugs laying around (from my cloner) and that could be perfect to squeeze in my Inkbird sensor.
PXL_20240831_160233816.jpg
 
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DriverMain

Member
First of all, many thanks to you for this thread

I'm currently setting up my cooler (thermoelectric KlarsteinBarolo15) with the knowledge gathered from here :)
As Asey1 posted, it is possible to wire the dehumidifier and place the probe inside without drilling a hole in this particular case.

Now that I tested the cooler (without plant material), everything seems to work fine as far as cooling and dehumidification is concerned, the cooling takes quite a long time though (it's 26°atm and to reach 15° took me about 1-2h), did you have the same experience?
I have 4 calibrated Xiaomi hygro/temp sensors installed alongside a precise Aranet4. When I checked the thermo/hygrometers, I was disappointed that the temperature in the cooler fluctuates quite a bit. It fluctuates between 3° degrees (air circulation?).
Especially when I placed the sensors directly on the glass door at the beginning, as someone here suggested, I never got the temperature reading I set on my cooler (maybe the hot, dehumidified air hits the door and moves up? Or it is due to the glass door, which cannot store the cold as well?)

So I was wondering if any of you have had the same experience and if this could be a problem for my upcoming dry.
I have attached a side view of the fridge for clarification. Measurements have been taken in various areas as you can see.
 

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Hook Daddy

Well-Known Member
First of all, many thanks to you for this thread

I'm currently setting up my cooler (thermoelectric KlarsteinBarolo15) with the knowledge gathered from here :)
As Asey1 posted, it is possible to wire the dehumidifier and place the probe inside without drilling a hole in this particular case.

Now that I tested the cooler (without plant material), everything seems to work fine as far as cooling and dehumidification is concerned, the cooling takes quite a long time though (it's 26°atm and to reach 15° took me about 1-2h), did you have the same experience?
I have 4 calibrated Xiaomi hygro/temp sensors installed alongside a precise Aranet4. When I checked the thermo/hygrometers, I was disappointed that the temperature in the cooler fluctuates quite a bit. It fluctuates between 3° degrees (air circulation?).
Especially when I placed the sensors directly on the glass door at the beginning, as someone here suggested, I never got the temperature reading I set on my cooler (maybe the hot, dehumidified air hits the door and moves up? Or it is due to the glass door, which cannot store the cold as well?)

So I was wondering if any of you have had the same experience and if this could be a problem for my upcoming dry.
I have attached a side view of the fridge for clarification. Measurements have been taken in various areas as you can see.
I do not have any experience with your particular model cooler, but it seems everything is working fine. The temp is going to vary slightly as the cooler and dehumidifier work, that’s normal. If you don’t like it rising to 17, just set the target temp to 12c, that’s where I set mine, and it will vary from 11c to 13c. I have never put my probes on the glass door, I have mine similar to where the fridge probe is in your drawing, about half way up and near center as my unit will allow.
 

Week4@inCharge

Well-Known Member
My unit is compressor, and I'm going sans dehumidifier and just using an Inkbird to automatically shutoff the cooler. I missed aligned the first attempt at drilling (DUH!) so what a mess I made, got it on the second attempt. It will hold (testing with a damp sponge inside) a steady 67F -57%H at the moment.. not to bad considering the alternative. Nice thread!
PXL_20240829_023028215.PORTRAIT.jpgPXL_20240830_005041435.jpgPXL_20240831_182247756.jpg
 
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