You do not need a CoolBot to cool your walk-in cooler with an air conditioner. You just need to understand the functions of the CoolBot and replace those functions with a few much cheaper off-the-shelf parts. With this knowledge you can save hundreds of dollars and still build your own walk-in cooler to effectively store your own vegetables and any other products that require cold storage.

CHAPTERS
0:42 CoolBot Functions
2:52 Alternative Supplies
4:30 Installation
14:00 Next Steps

DIY COOLBOT SUPPLIES
• Inkbird Temperature Controller:
• Light Socket Plug:
• 5.5W LED Spotlight:
• 4.5W LED Spotlight:
• Light Socket Adaptor for GU-10 Bulb:
• Aluminum Foil Tape:

COOLBOT DISCOUNT
• Save $20 on a CoolBot Purchase:

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25 thoughts on “Build Your Own Walk-In Cooler with this DIY CoolBot Alternative

  1. wess carey says:

    " Cool" video LOL! Another important point is the ALL THE FINS on the inside and outside of the machine need to be CLEAN and STRAIGHT! Maximum AIRFLOW is very important. It helps cool the room faster and helps keep the fins from freezing up.

    I dissagree with the "correct size" AC unit. My experience has been the bigger the better. Lots of insulation with a big AC unit has really worked well for me. "How cold does it get"? that depends on MANY FACTORS. AC size, room size, insulation thickness, outdoor temperature etc.

  2. Branken Flowery says:

    I priced out all the items needed for this homemade version of a cool bot. I used Amazon and I live in Arkansas. The total price with tax is $109.98. Just saying it saves so much money. I am going to use this method to make a walk-in cooler for my flowers. I cannot afford a cool bot.

  3. ray arevalo says:

    The question is if that works with any brand of split type a / c, since coolbot as I see it is not compatible with some brands, could you help me please I have an electrolux a / c

  4. Jared Grover says:

    I just built that setup that you have described, and in doing so I had a question.

    It appears in this setup, the room temperature sensor that activates the AC compressor is actually in the fins of the AC unit itself, correct? This would be referring to the Inkbird on the right.

  5. John nunya says:

    Looks like using your set up is a no brainer. I'm building a shed with 5" thick metal SIPs, basically commercial walk in cooler panels. Planing in building a 4×8' walk in cooler inside with the panels on all 6 sides. Think this should work well?

  6. Daniel says:

    No no no you don't need 2. You plug the temp sensor of just the one onto the fins of the ac unit. Then you plug the ac unit directly into the wall power. Then you hook the light bulb to the ac unit temp probe. You power the light with the cool port on the controller. When the controller senses the fins on the ac unit are getting too cold it kills power to the light. Then the ac unit has its own power from the wall to go onto a defrost.

  7. CMZ neu says:

    Great video! One thing though, but in my country it's much cheaper to buy one arduino and two temperature sensors than an inkbird, could this be the case for the US also?

  8. RenoHuskerDu says:

    Of the heat that is produced by LED lights, only about 20% is transformed into light, which results in a lamp that is cool to the touch. However, the back of the LED releases the remaining as thermal energy. If you examine larger LEDs as in vehicle headlights, you'll see heat sinks on the back and possibly even small fans. So the heat trigger light you've designed and deployed could instead be a very small incandescent bulb such as a Christmas tree string bulb. They release most heat as IR out the front. You might, in this manner, generate even less overall heat into the room.
    FYI and thanks for the informative vid.

  9. cchickering says:

    What temperature is ideal for storing onions? I've also heard that potatoes and onions need precise humidity to keep for long periods of time, do you control that as well? Do you run a fan for airflow?

  10. Darcy Assels says:

    Excellent video ! I was wondering if you would be able to give me some advice. I am in the process of making my own meat cooler, it is 8’X8’x9’ high. The purpose for this will be to hang deer in at the beginning to mid October where the temperatures can easily be 20 degrees Celsius during the day, and could definitely only be 10 degrees Celsius also. It would only be about 7 days that I would need to use this. My questions I have are what can I get by with, without having to really go all the way by doing everything right, as I want to make this as cheap as I can. I have (2) 5000 btu air conditioners already at home, would they work with the coolbot or your method? Or would I need a bigger A/C unit? And being I only need it for 7 days or so, is it absolutely necessary to insulate it? Or can I make do without doing that? Thank you

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