Bitmain and Canaan now offer Bitcoin mining hardware across more than one thermal architecture, which means the old single-box argument no longer tells the whole story. The real fleet question is which manufacturer gives operators the strongest lineup across air, hydro, and immersion cooling when hashrate, joules per terahash, and deployable density all matter.

For this comparison, “best” means the strongest currently documented model from each manufacturer in each cooling class using the manufacturers’ own published specifications where possible. It is a specification comparison, not a guarantee of immediate availability, and it does not include taxes, shipping, infrastructure, or facility overhead.

Cooling	Bitmain	Canaan	Spec Winner
Air	Antminer S21 XP — 270 TH/s, 13.5 J/TH	Avalon A16XP — 300 TH/s, 12.8 J/TH	Canaan
Hydro	Antminer S23 XP Hyd. — 600 TH/s, 8.9 J/TH	Avalon A1566HA — 500 TH/s, 16.8 J/TH	Bitmain
Immersion	Antminer S21 XP Imm. — 300 TH/s, 13.5 J/TH	Avalon A1566I — 273 TH/s, 17.8 J/TH	Bitmain

Round 1: Air Cooling Goes to Canaan

At the air-cooled high end, Bitmain’s official shop lists the Antminer S21 XP at 270 TH/s, 3,645 W and 13.5 J/TH. That is still a strong machine by modern hashprice standards, but it is no longer the most aggressive air-cooled spec in this matchup.

Canaan’s official Avalon A16XP page lists 300 TH/s, 3,850 W, and 12.8 J/TH. That gives Canaan about 11.1% more rated hashrate per machine and roughly 5.2% better energy efficiency than the S21 XP on published specs.

On a theoretical miner-only basis, the Canaan air machine works out to about 78.1 PH/s per MW, versus roughly 74.1 PH/s per MW for the Bitmain S21 XP. For operators constrained by conventional rack space and standard air-cooling infrastructure, Canaan wins the air round clearly.

Round 2: Hydro Cooling Swings Hard to Bitmain

Hydro is where Bitmain opens a major gap. Bitmain’s current S23 XP Hyd. listing shows 600 TH/s, 5,340 W, and 8.9 J/TH. That is one of the most aggressive publicly listed SHA-256 miner specs on the market.

Canaan’s strongest current hydro listing, the Avalon A1566HA, is published at 500 TH/s and 16.8 J/TH. Against that benchmark, Bitmain delivers about 20% more unit hashrate and roughly 47.0% better energy efficiency based on the manufacturers’ rated J/TH figures.

The fleet-level implication is even larger. Bitmain’s 8.9 J/TH hydro spec implies roughly 112.4 PH/s per MW, while Canaan’s 16.8 J/TH hydro spec implies about 59.5 PH/s per MW. That is a dramatic difference in theoretical SHA-256 density before pumps, heat exchangers, and facility overhead are added.

Hydro systems do add complexity. Operators must engineer liquid loops, manifolds, pumps, filtration, and maintenance procedures. But if the site is already built for hydro, Bitmain’s current flagship is decisively stronger on paper.

Round 3: Bitmain Also Wins Immersion

In immersion, Bitmain does not keep the same hydro-level gap, but it still wins the comparison. Bitmain’s product lineup and shop references currently include the Antminer S21 XP Imm. at about 300 TH/s and 13.5 J/TH, a fanless immersion-oriented variant designed for dielectric fluid deployments.

Canaan’s current immersion counterpart, the Avalon A1566I, is listed at 273 TH/s and 17.8 J/TH. That gives Bitmain roughly 9.9% more rated hashrate per machine and around 24.2% better energy efficiency on the published ratings.

At the megawatt level, the Bitmain immersion figure equates to about 74.1 PH/s per MW, while Canaan’s comes out near 56.2 PH/s per MW. For large immersion farms, that difference can materially change tank count, transformer loading, fluid-loop design, and the amount of building space required to reach a target exahash.

A Note on Fairness and Sources

One challenge with cross-manufacturer comparisons is that different companies expose different amounts of detail in public listings. Bitmain currently has a deeper and more aggressive hydro roadmap, while Canaan’s public shop is clearer on some individual Avalon SKUs. For that reason, this article uses each company’s own published headline specifications wherever available and compares them at face value rather than trying to reverse-engineer every wall-power assumption.

That still means real-world field performance can differ. Ambient temperature, coolant inlet temperature, voltage quality, silicon variation, firmware tuning, and overall site design all influence how a miner actually behaves. Any serious procurement decision should also account for rack-and-stack constraints, serviceability, failure rates, spare parts, warranty support, and the electrical design of the facility.

Cooling Method Changes the Economics

Air cooling remains the easiest architecture to deploy and maintain. It fits more existing mining containers and retrofits, but it also means fan power, dust handling, ambient limits, and higher acoustic stress. Hydro and immersion replace much of that with liquid-side complexity, but they can enable far denser thermal envelopes and, in some cases, much higher useful hashrate per megawatt.

That is why modern miner comparisons should not stop at one machine. The real decision is whether a fleet operator wants the best air box, the best hydro box, or the best full portfolio of cooling-aware options. As BitcoinVersus.Tech has argued in its air-coolant energy equation and broader cooling coverage, the miner is only one part of the thermal-and-electrical system.

Canaan Wins Air, Bitmain Wins the Fleet

The cleanest conclusion is this: Canaan currently wins the conventional air-cooled matchup, while Bitmain wins hydro, Bitmain wins immersion, and Bitmain wins the overall three-cooling fleet.

Canaan’s A16XP proves that Avalon is still highly relevant at the high end of conventional deployment. But Bitmain’s hydro lineup—especially the S23 XP Hyd.—is so much stronger on published spec that it changes the balance of the full portfolio. Once immersion is added, Bitmain stays in front.

In other words, if an operator is choosing only for an air-cooled building, Canaan has a serious claim. If the question is which company currently fields the stronger all-around Bitcoin mining fleet across air, hydro, and immersion, the answer is Bitmain.

BitcoinVersus.Tech

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