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well, I think someone just wanted to scam you with DCX rack, capable of hosting 24 ASIC miners of S19 shape you need to pay just about 25k$, and this already includes fluids, dry cooler, tanks, manifolds... everything and the bigger set consists of 2 racks and a bigger dry cooler at about 55k$ and if you need more, you just need to add more and more racks and you can build the solution for hundreds of miners with such a system
there is the external dry cooler, that removes the heat to the atmosphere but it's better to connect it to the water boiler, floor heating of the swimming pool, etc., to reuse that heat it's very easy with DCX tanks, as they're equipped with liquid-to-liquid heat exchanger like this [https://twitter.com/DCX\_Immersion/status/1726605046929055893](https://twitter.com/DCX_Immersion/status/1726605046929055893)
sure, and that's why there is the external dry cooler, that removed the heat from the atmosphere but it's better to connect it to the water boiler, floor heating of the swimming pool, etc., to reuse that heat it's very easy with DCX tanks, as they're equipped with liquid-to-liquid heat exchanger like this [https://twitter.com/DCX\_Immersion/status/1726605046929055893](https://twitter.com/DCX_Immersion/status/1726605046929055893)
well, typically it's one way decision but if you need to revert them for example to air cooling you need to 1. rinse them 2. use DCX solvent, to clean the remaining film of the oily ThermaSafeR dielectric fluid 3. let it dry 4. apply thermal paste on the chips, and you're ready to put them into the operations but after you try immersion, you will never go back for air cooling ;-)