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So do you recommend I go internally if I can keep the coil large enough and successfully clean?

Yeah that was one of the plans, I was going to solder some copper pipe surrounding the FV which is tough but with tin I can do it. Then put insulation back on but that honestly is just as much work as cleaning it lol. But welding fittings in would be better. I might see if I can make myself a...

Thank you, the tank is insulated with another stainless steel plate surrounding that insulation, I was going to take that off and wrap the copper coil and put insulation over that copper with the plate back on if I did it externally. But it might be easier to go stainless steel on the inside...

Stainless steel

Thanks!

Yeah so far this seems the way to go. The copper coil around seemed easier to do I was just afraid of not reaching the temps I would like.

Haha thank you, yeah I got lucky when an old winery gave me their mixer and decided to start using it as a fermenter but now I’m trying to design a cooling system. See I also don’t mind the slower response time and it might even be easier to do, I was just afraid taht it might not even get to...

Yeah it seems to be the best route for the heat transfer regardless of copper being more conductive. The issue was just sanitizing but I can get over that. Thanks!

I am adding a cooling system to my 110 gallon fermenter. I am curious about whether it would be more effective to run copper coil around the outside because of sanitation or a stainless steel coil internally for a more effective change in temperature. (Don’t want to put copper inside)

I am curious about space and would like to know if I can do my fermenting in 20ft shipping containers or even just barrel aging within those shipping containers. They do not have air conditioning and are just straight unmodified containers. I could make accommodations on the shipping containers...