Bitmain Antspace HW7 Hydro Mining Container

It is Bitmain's next-generation 40-foot hydro-cooling container, rated at 2MW of cooling capacity, designed to house and cool the Antminer S21 Hydro series at facility scale. It arrives as a complete two-piece system, the mining container and an integrated cooling tower, effectively a megawatt-class mining hall delivered as one unit rather than built on-site.

Capacity is the headline. The HW5 is a 40-foot container rated at 1.2MW; the HW7 is the next-generation successor rated at 2MW, roughly doubling the cooling envelope and the miner population a single container footprint supports. For operators whose constraint is megawatts per footprint, that is the reason to choose it over the prior generation.

The Antminer Hydro series, the S21 Hyd, S21 XP Hyd, and S21e XP Hyd, the current hydro-cooled lineup it is engineered around, with the broader S19/S23 Hydro family generally compatible. Because these are SHA-256 machines, the container is a Bitcoin mining deployment. The exact validated miner list for the HW7 is confirmed against Bitmain's specification for your build.

The population scales with the 2MW cooling envelope and the power draw of the specific model you deploy: a higher-wattage miner means fewer units per container, a lower-wattage one means more. Against roughly double the HW5's capacity, the HW7 holds materially more than the HW5's 210 units, and MillionMiner confirms the exact count for your chosen miner as part of the configuration.

Cooling overhead. Air-cooled containers spend ten to twenty-five percent of their total power moving air with fans; closed-loop hydro moves heat through liquid and drops that overhead to the low single-digit percent. On a 2MW site, that is hundreds of kilowatts redirected from cooling waste to hashrate, continuously, which over the life of a deployment is a direct and substantial effect on yield.

Integration and accountability. The coolant loop is matched to the miners' hydro plates, the power distribution is sized to their draw, and the whole system is validated together rather than assembled from a third-party container and separately sourced miners. If something fails, warranty and support sit with one manufacturer instead of two vendors assigning blame to each other. At megawatt-scale capital outlay, that single-vendor accountability is real risk reduction.

The Antspace ships as a stackable two-piece system: the mining container and an industrial cooling tower that handles coolant circulation and heat rejection. The Antspace family offers tower options matched to climate, from dry-wet towers for hot regions to dry towers for cold ones and heat-exchanger options for heat reuse. The specific tower configurations available for the HW7, and the right one for your site's climate, are confirmed with your order.

The Antspace design is modular by intent: operators add containers as power and site capacity allow, each a self-contained 2MW block. This lets a farm grow in defined megawatt increments with predictable infrastructure per step, rather than committing to one monolithic build, and MillionMiner plans multi-container deployments and their shared electrical and site requirements.

The HK3 is the 20-foot, roughly 1MW, 210-unit container; the HW7 is the 40-foot, 2MW, next-generation unit. The HK3 suits sites scaling in smaller increments or with tighter footprints; the HW7 is the choice when the goal is maximum cooling and miner density per container and per deployment. MillionMiner carries both and matches the container to your site and growth plan.

Substantially. Air-cooled containers run banks of high-speed fans that generate significant noise; hydro circulates liquid and minimizes fan reliance, so a hydro container runs far quieter. For deployments near noise-sensitive boundaries or under acoustic regulation, that difference can be the factor that makes a site viable.