Packing a hydro miner for a 7,000-mile trip

An air-cooled S21 is a relatively forgiving thing to ship. It is light, the hashboards are well supported in the factory foam, and a bit of rough handling usually does no harm. A hydro-cooled unit like the Whatsminer M63 or the Antminer S21+ Hyd is a different problem entirely, and shipping one badly is how units arrive with cracked manifolds and shifted cold plates.

Here is how we pack them for the long haul.

Why hydro and immersion units are harder to ship

Three reasons. They are heavy, a 3U hydro unit can run 15 kg or more, which means more inertia working against the packaging every time the carton is dropped or stacked. They are dense, with liquid cooling plumbing and cold plates that do not tolerate flex. And they are expensive, the hydro and immersion SKUs sit at the top of our price list, so a transit failure is a costly failure.

The packing sequence

• Manifold and fitting check. Before anything is boxed, a technician confirms the coolant fittings are capped and the manifold is secure. Hydro units ship dry on our SHA-256 lines unless a buyer specifically arranges otherwise, so there is no coolant to leak in transit.
• Original manufacturer foam. The unit goes back into the exact factory-moulded insert it arrived in. That foam is cut to the unit geometry and is the single most important damage-prevention layer. We do not substitute generic foam.
• Hashboard and cold-plate seating. We confirm the hashboards are seated and, on immersion units, that the cold plates have not shifted in handling. Anything that moved during inspection gets re-seated by a technician before it is packed.
• Reinforced outer carton. The factory box goes inside a second reinforced carton with edge protection. For the heaviest hydro units we add corner blocking so the inner box cannot shift under stacking pressure in the courier network.
• Pre-shipment photo. Serial visible, logged against your order, same as every unit we ship.

The courier decision

Weight changes the courier math. For a single air-cooled unit we pick whichever of DHL, FedEx, or UPS has the cleanest routing to your country that day. For heavy hydro and immersion units, or for multi-unit pallets, we weight the decision toward the carrier with the best heavy-freight handling on your lane, even if it costs us more, because a smooth handling chain matters more than a day of transit time on a unit this dense.

What happens if it arrives damaged anyway

Transit damage is rare with this packing standard, but it is not zero. If a unit arrives with visible damage, photograph it before you unpack further, keep the packaging, and message us. Every shipment is insured in transit. Between the insurance and our 60-day replacement warranty, a transit-damaged unit is our problem to resolve, not yours to absorb.

This is the practical reason DDP-paid matters on heavy units specifically: the unit is insured and the customs path is handled, so a hydro miner that costs several thousand dollars is not sitting in an import limbo waiting for you to pay a surprise fee or chase a damage claim with a courier in a language you do not speak.

If you are deploying hydro or immersion

Cooling choice is a facility decision, not a hype decision, and we have a full guide on that. If you already know you want hydro or immersion and want to confirm packing and freight for your specific country before ordering, message us and we will walk you through it.

Browse hydro and immersion miners →  ·  Ask about freight for your country