Hydro-Cooled Miners for Sale
A hydro (Hyd) miner is cooled by liquid instead of fans: coolant runs through cold plates on the hashboards and carries the heat to a dry cooler or a cooling tower. That lets a hydro unit run more hashrate in the same space, with less noise and steadier chip temperatures. This page lists every hydro-cooled miner on Endless Mining, including Antminer S21 Hyd, S19 Hyd and S23 Hyd models.
Hydro miners need more than a power outlet. Most run on a three-phase 380–415 V supply and draw more than 5,000 W each, and they need a cooling loop with a pump, filtered coolant and a heat exchanger. Plan the site before you buy the miner, and check the input voltage in each listing title.
Listings 13 listings
Prices are in US dollars. Listings in stock come first, then by price.
![[WTS] 2x Lightly USED Antminer S21 XP Hydro (473T) – Like New!](/_next/image?url=https%3A%2F%2Fstorage.googleapis.com%2Fendlessmining-production-media%2F2026%2F06%2F9bab70a7-5084-4ee3-8d32-d791ccc82853-scaled.jpeg&w=3840&q=50)
Questions
What do I need to run a hydro miner?
Usually a three-phase 380–415 V power supply, a closed coolant loop with a pump and a filter, and a dry cooler or cooling tower to shed the heat. Follow the manufacturer's coolant and flow-rate specifications for the model.
Is hydro cooling better than air cooling?
It runs more hashrate per unit, is far quieter at the machine and lets you reuse the heat, but it costs more to set up. Air-cooled miners are simpler: they need only power and airflow.
Why are hydro miners more efficient?
Liquid moves heat better than air, so the chips run at a steadier temperature and the miner needs no high-speed fans. That is part of why the hydro versions of the Antminer S21 are rated at a lower J/TH than their air-cooled counterparts.
How does buying here work?
Prices are in US dollars. Listings from independent sellers are paid through Escrow.com, which holds your payment until you accept the item. Outside the US, Endless Mining ships its own miners internationally (ask for a shipping quote); items from other sellers ship to US addresses only. Sales by Endless Mining are final, except where the law requires a return.