Home / Blog / Bitdeer SealMiner A4 Pro Air
Outlook · Sep 21, 2026 · 5 min read
Bitdeer’s A4 Pro Air is claiming the best first-year return on the board
336 TH/s at 10.9 J/TH, air-cooled, and about 50% in year one at our rates — higher than anything we currently host. Bitdeer has gone from irrelevant to leading in two generations, and the A2 Pro is the reason to take it seriously.
Bitdeer SealMiner A4 Pro Air (336 TH/s)
The claim
The A4 Pro Air is 336 TH/s at 10.9 J/TH, air-cooled, not yet shipped. At our Argentina site those specifications work out at about $34,300 of electricity per bitcoin and roughly 50% in the first year — the highest first-year figure of anything on our board, hosted or announced.
For scale: the best air-cooled machine we actually host today is the S21 XP at 13.5 J/TH. The A4 Pro Air is claiming a fifth better than that, in the same cooling, which puts genuine hydro-class efficiency into racks that cannot run water.
10.9 J/TH in an air-cooled box is a figure that did not exist outside a water loop a year ago.
Why the claim is credible
Because we can check the last one. Bitdeer’s A2 Pro Air has been on our floor since April 2026, and it does what it says: it hits its rated 14.9 J/TH rather than falling short of it, runs quieter than the comparable Antminers at 63–65 dB, and ships tuning firmware natively that Bitmain expects you to buy separately.
That matters more than a spec sheet. A vendor that met its number last generation is a vendor whose next number is worth planning around. Two generations ago Bitdeer was not a serious option for a hosting floor; on the A2 Pro it became one, and the A4 Pro is the first time their roadmap leads the field rather than follows it.
What to weigh before committing
The honest caveats are the ones that apply to any first-run machine from a challenger vendor. There is no field failure record for the A4 boards, and the repair ecosystem around Bitdeer hardware is younger and thinner than the one around Bitmain — fewer benches, fewer spares, slower diagnosis.
Hosted with us that matters considerably less than it would in a garage: repairs in Argentina are billed at the cost of parts, and we hold the spares. But it is the reason to buy several rather than one, which is the right approach to any machine at the front of a generation.
The other consideration is timing. Every generation has been cheaper a year after release. If you are buying to hold through the 2028 halving, 10.9 J/TH is a long way past the line where the halving retires machines, and that runway is worth more than the discount for waiting.
- Bitmain Antminer S23 XP Hyd (600 TH/s) — 8.9 J/TH, Pre-order, $29,057 of electricity per bitcoin, 26% year one
Which machines this covers
Disclosure
Firsthand Bitcoin sells and hosts mining hardware, including this machine. No manufacturer, distributor or affiliate programme paid for or reviewed this page and we take no commission on the links above. Historical figures are computed from daily bitcoin price and network hashprice, each day valued at its own prices. Nothing here is investment advice.