Reddit mentions of bayite Temperature Controller BTC201 Pre-Wired Digital Outlet Thermostat, 2 Stage Heating and Cooling Mode, 110V - 240V 10A

Can be anything as simple as this. You don't need the really fancy ones, and I'm sure there are cheaper ones that will do the job (this unit is bulky, but I can verify it does the job).

It has a temperature probe as well as a temperature setting. They usually have several other settings (to control the allowed temperature swing, etc.) Once configured it aims for the temperature and cuts power to the outlet when the temperature is met and within range. When it is too hot (above the set range) then the the outlet is turned on, so the wine fridge can bring the temperature back into the desired range.

e.g. Set for 68 +- 4F Then it'll turn on at 72, cool to 64 and turn off. Cycle begins again.

You will need to experiment to find ideal range, time and response for your area and cooling load (e.g. an empty wine fridge will cool quicker than one packed to the brim). You also don't want it your settings at 70F w/0F swing or it will turn on and off, again and again as it bounces off the temperature setting.

edited: For some clarification.

I have multiple of these. They are good for the price.

And one of these that I use for my corn snake because it is more precise.

But, I just found this prewired controller that's only $34.

It's a 10 Amp max but should be enough to run the refrigerator. It looks like a good deal.

If you're looking for a fermentation fridge or kegerator, I can fit two 5 gal ball lock corny kegs and a 5 lb CO2 tank, or one glass fermenter, in one of these ($125)

https://www.farmandfleet.com/products/864091-danby-refrigerator-with-freezer.html?feedsource=3&gclid=EAIaIQobChMI3ty1irPx2QIVgyaGCh0xWgmOEAkYASABEgJ-2PD_BwE

And use one of these for temperature control ($35)

https://www.amazon.com/Temperature-Controller-bayite-Pre-Wired-Thermostat/dp/B01KEYDNKK/ref=sr_1_1_sspa?ie=UTF8&qid=1521222668&sr=8-1-spons&keywords=temperature+controller&psc=1

Minimum temperature is around 40F and I had to do some limited DIY work to remove the door mounted shelving.

I am still a newb on my first grow, so please take this as potentially wrong. Also, if anyone sees a problem, let me know. I'm trying to do my best.

I started in a tent but I built a 6'x8' grow room. I posted it to this sub a while back. Here is the album: http://imgur.com/a/Gshra

I upgraded to COB LEDs. They can pull 500 watts (40 watts per sqft) They are currently at 85% (34 watts per sq ft). The plan is to slowly ramp them up to 100% the first few week of flower. (I'm currently in the first week of flower). Here the album on that build: http://imgur.com/a/iWYiP

I'm in a basement where I can draw a large volume of cool air into the room. It becomes a problem during lights out because it gets too cold. I have on of those oil filled radiator heaters hooked up to a thermostat-controlled outlet:

https://www.amazon.com/dp/B01KEYDNKK

When it hits 69F, it kicks on until it gets up to 79F then it shuts off.

To control the upper end of the temperature, I use my fan and this speed controller.

fan:

https://www.amazon.com/dp/B018WM0EMQ

speed controller:

http://www.hyper-fans.com/shop/bybrand/hyper-fan/hyper-fan-temperature-speed-controller

I haven't had any need to run an A/C unit but I could plug one into the "cooling" side of that temperature-controlled outlet.

The humidity in the room is rather high right now (50-60%). It seems to go up when I water. I'm on the fence if I should get a dehumidifier or just let it ride. If I do get one, that will have to have a humidity I can set.

Also, I put my original grow tent in grow room to veg some clones. I covered up all the passive air vents and taped them closed with gorilla tape. Then, I used flexible ducting to make an exhaust tube and intake tube. Using the flexible tubing, I can make light traps. I put 4 CFLs in there on a 18/6 timer. I do have an exhaust fan in the tent. It does not, however, need a carbon filter as the whole room is filtered. I'm not sure how a veg tent in a flower room is going to work out, but I am going to find out. :)

Anyway, I'm a newb on my first grow. That is, however, how I am currently growing weed.

I use this in veg. It can both heat and cool (I never heat), and goes for 1 target temperature. https://www.amazon.com/dp/B01KEYDNKK/ref=cm_sw_r_cp_api_bN4ZAb9T6STGE

I use this in flower. It can either heat or cool, not both though (again I never heat). It cools to 2 target temps, day and night. https://www.amazon.com/dp/B007FNOAU6?ref=yo_pop_ma_swf

Both control a duct fan blowing in from a window.

This should do the job.
https://www.amazon.com/bayite-Temperature-Controller-Pre-Wired-Thermostat/dp/B01KEYDNKK

This is an old beverage chiller I had attached a temperature control switch to it and devote it to prepare my kombucha as well as fermented vegetables in the temperature range between 70-80f

Cause where I keep them the temperature go above 30c / 86F, so you can consider this setup as normal room Temp

and about your Q preserving the kombucha ( I consider my self a beginner) but from my research yes you can preserve the kombucha in the fridge

below you can see the temperature controller I use

https://www.amazon.com/gp/product/B01KEYDNKK/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I just purchased a bayite, it's supposed to be more accurate than the inkbirds, we'll see I get it saturday.

I got a radiator type then one of these
https://www.amazon.com/gp/product/B01KEYDNKK/ref=ox_sc_saved_title_9?smid=A2EFSDTWMPHWEA&psc=1

I use a IR temp gauge to measure the temp of the leave more than just go by with the tent thermometer reads. I have the Temperature power supply set to 75 degrees and it turns on at 76 degrees and kicks off when it gets to 73 since the window unit I have is cheap and just has an on and off along with fan speed and not much temp control. I could go cooler but I'm trying to save on the cost of energy. I run my flower from 7pm to 7am because it's easier to maintain the lower temp when the lights are off. You can find a new window unit on sale for around $100-$120. I got one at Walmart but later noticed one for cheaper at Atwoods.

something like this ? https://www.amazon.com/Temperature-Controller-bayite-Pre-Wired-Thermostat/dp/B01KEYDNKK/ref=sr_1_2?s=lawn-garden&ie=UTF8&qid=1525685813&sr=8-2&keywords=attic+fan+240v

Yeah inside the humidor then you get much better consistency.

AC Infinity MULTIFAN S2, Quiet 120mm USB Blower Fan with Speed Control, for Receiver DVR Xbox Modem AV Cabinet Cooling https://www.amazon.com/dp/B012CL2V3I/ref=cm_sw_r_cp_apa_i_hHD9AbD4XJZ1Z


I have it at the back on the floor pointing up.


This is the temp switch I got:

Temperature Controller bayite BTC201 Pre-Wired Digital Outlet Thermostat, 2 Stage Heating and Cooling Mode, 110V - 240V 10A https://www.amazon.com/dp/B01KEYDNKK/ref=cm_sw_r_cp_apa_i_WID9Ab9WE8K1C

Probably the coolest think i have found. I really want one for my area but its too small for a heater. if you want cheap plug in stuff this would be awesome https://www.amazon.com/dp/B01KEYDNKK/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=3W2SWX0CJYGCL&coliid=I33CPIYC3TOIPW

Just grab a $30 temperature controller and you can use your slow cooker as a sous vide cooker.

https://www.amazon.com/bayite-Temperature-Controller-Pre-Wired-Thermostat/dp/B01KEYDNKK

i would like to build an air conditioning system like that. what air conditioner do you use? does the air conditioner go back to its settings when it turns back on? can you provide a link to the black box and can you provide a link to the air conditioner. i found this on on amazon
is this the one u used?
edit: this one is rated for more amps

Get radiator/fan combos from a junkyard, like from an old suburu. They are matched set. Hot water in the top. Less hot water out the bottom, back to the tank and repeat. Lowe Depot has fountain pumps to circulate the water in the tank. (adapters need for different size piping) This is all low pressure you just need to move a lot of water. Heating/cooling thermostat. plug the pump into heating outlet. add an exhaust fan to help cool.

As far as solar collectors. They can be simple. I would buy a "real" one and test it against a 300' roll of 1" black pipe ($100) with water pumping thru it. Put that roll in a sealed, insulated box and get some heat.

I have a Bayite 201 that another r/cigars fellow had mentioned: https://www.amazon.com/Temperature-Controller-bayite-Pre-Wired-Thermostat/dp/B01KEYDNKK

I plugged in a 3 to 1 outlet and have the fridge and fan plugged into the cooling circuit. I have it set to cool to 65 with a 3 degree delta, so at 68 degrees, it will kick on.
I keep the sensor up at the top since it's warmer there. There can be about a 2 degree variance between top and bottom. After circulation it evens out. I also figure that this will save on electricity long run as I had it plugged in and it sounded like it was always running. When it turns off, it will reset to the lowest cooling setting which is 55, but it will turn off well before that so it's not a worry.

I still keep everything in tuppers. I haven't gotten to that level of trust yet with this thing and haven't comfy w/ KL.