21energy Ofen 2 Pro
- Hashrate
- 60 TH/s
- Power
- 1,100 W
- Efficiency
- 18.3 J/TH
- Noise
- 45 dB
from $2,309 Sold out $38 per TH
Space heater Floor standing In production
D-Central Antminer S19 Space Heater Edition
D-Central's bigger space heater, built on a reconditioned Antminer S19 with quieter fans and a heater enclosure. Offered with S19 (42 TH/s) or S19j Pro (46 TH/s) hashboards at roughly 1.1–1.2 kW per D-Central's comparison table, though exact power depends on the delivered unit. About 45–55 dB.
Best price $530
$12.63 per TH · Refurbished · In stock at D-Central Store notes
Black, S19 42 TH/s (S19j Pro 46 TH/s black CAD 820; orange CAD 973-1,038)
Note from 4 Nov 2026.
Hashrate42 TH/s worst 250 GH/sbest 1.16 PH/s 135th best of 197 (the bar uses a log scale)
Power (stock)1,200 W lowest 11 Whighest 22 kW 144th highest of 199 (the bar uses a log scale)
Efficiency29 J/TH worst 100 J/THbest 8.9 J/TH 170th best of 195
Earns per kWh$0.053 worst $0.010best $0.171 169th best of 195
Heat output4,095 BTU/h worst 38 BTU/hbest 75,067 BTU/h 144th best of 199 (the bar uses a log scale)
Noise45–55 dB worst 76 dBbest 25 dB 41st best of 68
Price per TH$12.63 worst $539.96best $1.82 68th best of 156 (the bar uses a log scale)
Where to buy
| Store | Trustpilot | Condition | Availability | Listed price | In your currency | Per TH | Checked | Link |
|---|---|---|---|---|---|---|---|---|
| D-Central Ships from Canada Store notes Black, S19 42 TH/s (S19j Pro 46 TH/s black CAD 820; orange CAD 973-1,038) These notes are from 4 Nov 2026. Price and stock were checked since. | No score | Refurbished | In stock | CA$755 | $530 | $12.63 | 12 Nov 2026 | Visit |
Prices as listed on each store's page on the date shown, without shipping. Prices marked excl. tax leave out VAT or sales tax, and others may too. Per TH uses the hashrate of the unit each store sells. Converted at ECB rates of 11 Nov 2026. Trustpilot scores are for the store, not the device. Each store's name opens its page, with everything it sells and its reviews.
Heat, running cost and sats
- Heat per day
- —
- Electricity per day
- —
- Mining earns per day*
- —
- Net cost per day
- —
- Net cost per kWh of heat
- —
- Solo: chance of a block per year
- —
- Earns per kWh, on 3-month averages
- —
- Payback
- —
The maker gives no hashrate for this mode, so we can't work out its mining income.
*What a pool would pay on average at today's difficulty, block reward and bitcoin price, before pool fees. Solo miners usually earn nothing, and very rarely a whole block. A plain electric heater turns the same electricity into the same heat, so the mining income is what makes the difference.
Payback is how long the bitcoin a device earns takes to add up to its price. It leaves out electricity, which buys the heat: compare earnings per kWh with your electricity price to see whether mining alone covers it. It uses the average of the last 3 months, to 12 Nov 2026: bitcoin at $79,558, 969 EH/s on the network and 3.15 BTC a block, less a 2% pool fee, for the hours you set. It cuts the block subsidy in half at each halving, the next around Apr 2028, and otherwise assumes those carry on unchanged, which they won't. Income at today's difficulty and price is about 17% below that average. Hashrate usually rises, though miners that stop paying after a halving may switch off, which leaves more for the rest. How we work it out.
Specifications
| Brand | D-Central |
|---|---|
| Model | Antminer S19 Space Heater Edition |
| SKU | DC-SH-S19 |
| Type | Space heater · Home |
| Form factor | Floor standing |
| Cooling | Air |
| Production status | In production |
| Launch date | — |
| Hashrate | 42 TH/s |
| Power consumption (stock) | 1,200 W * |
| Mining efficiency | 29 J/TH * |
| ASIC chip | Bitmain BM1398 (named by the device's maker); BM1362 in some versions (reported) |
| Miner inside | Refurbished Bitmain Antminer S19-series base (S19 or S19j Pro hashboards) |
| Heat output | 4,095 BTU/h |
| Input voltage | Depends on the delivered unit (no universal 120/240 V claim) * |
| Frequency | — |
| Net dimensions (W × D × H) | 400 × 196 × 290 mm (15.7 × 7.7 × 11.4 in) |
| Net weight | 13.2 kg (29.1 lb) |
| Noise | 45–55 dB |
| Operating temperature | 0–40 °C (32–104 °F) |
| Area heated | 14–56 m² (maker's claim) |
| Colours | Black, Orange |
| Company based in | Canada |
| Made in | — |
* Not confirmed by the maker's own documents yet.
Hashrate versions
| Version | Hashrate | Power | Efficiency |
|---|---|---|---|
| Antminer S19 hashboards (42 TH/s) | 42 TH/s | — | — |
| Antminer S19j Pro hashboards (46 TH/s) | 46 TH/s | — | — |
Features
- Reconditioned Antminer S19-series base (24-hour soak test)
- Arctic P12 Max or Noctua iPPC 3000 fans
- Home Assistant thermostat integration
- Ethernet (RJ45)
- Black or orange enclosure
- 90-day warranty
Colours
BlackOrange
Reviews
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Similar space heaters
21energy Ofen 3 Pro
- Hashrate
- 60 TH/s
- Power
- 1,100 W
- Efficiency
- 17.5 J/TH
- Noise
- 45 dB
from $2,587 $43 per TH
21energy Ofen Pro
- Hashrate
- 40 TH/s
- Power
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- Efficiency
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D-Central Antminer S9 Space Heater Edition
- Hashrate
- 13.5 TH/s
- Power
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- Efficiency
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- Noise
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Sources and data notes
- product page technical specifications (BM1398, configuration-specific power, 45–55 dB, 400x195.5x290 mm, 13.2 kg, 0–40 °C, refurbished base) d-central.tech
- D-Central store API, 'Bitcoin Mining Heaters' category (prices, stock, variations) d-central.tech
- D-Central 'Compare Space Heater Editions' table (S19 Space Heater ~42–46 TH/s, ~1,100-1,200 W, from CAD 755) d-central.tech
- ASIC chip: spec table 'ASIC Chip: Bitmain BM1398'; 'Bitmain Antminer S19 series (BM1398 chips)'; hashboard options 'Antminer S19 (42TH/s)' and 'Antminer S19j Pro (46 TH/s)'; no board count d-central.tech
- ASIC chip: Braiins table: S19 BM1398 x76; S19J Pro and S19J Pro NoPic boards BM1362 x126 academy.braiins.com
- ASIC chip: BM1398 is in the original S19, S19 Pro, S19j, S19a, T19; 'The later S19j Pro moved to a separate 5 nm die (the BM1362)' d-central.tech
- ASIC chip: BM1362 is the die in the S19j Pro; 126 per board; the S19j Pro badge has spanned more than one die revision d-central.tech
Chip by version: Antminer S19j Pro hashboards (46 TH/s): BM1362 (reported). See the chips page.
Not yet confirmed from the maker's own documents: efficiency; input voltage; launch date; where it's made; power (taken from the 'Compare Space Heater Editions' table on D-Central's S9 heater page, ~1,100-1,200 W; the S19 page itself calls power configuration-specific and its heat guide lists ~5,100 and ~8,190 BTU/hr profiles, i.e. about 1,500-2,400 W).
Spotted a mistake? Let us know.