Description
Your electricity bill is already heating your home. The Antminer S9 Space Heater Edition makes sure that energy does something useful on its way to warmth — it mines Bitcoin. Built by D-Central Technologies, Canada’s Bitcoin Mining Hackers since 2016, this unit takes the legendary Bitmain Antminer S9 and repackages it into a whisper-quiet, plug-and-play space heater that converts 100% of its power draw into usable heat while simultaneously hashing SHA-256 blocks on the Bitcoin network.
Every watt pulled from the wall becomes heat in your room. That is not an approximation — it is thermodynamics. A traditional 1,350W electric space heater converts electricity into heat at exactly the same efficiency as a 1,350W Antminer S9. The difference? The S9 gives you Bitcoin on top of the warmth. D-Central pioneered this dual-purpose approach in Canada, engineering custom silent enclosures that transform industrial mining hardware into residential heating appliances. No compromise on hashrate. No compromise on comfort.
The S9 Space Heater Edition is the most accessible entry point into dual-purpose Bitcoin mining. At ~13.5 TH/s stock — or tuned down to ~7-9 TH/s undervolted for even quieter, more efficient operation — it delivers meaningful heat output for small-to-medium rooms while contributing hashrate to the Bitcoin network. This is decentralization you can feel: warm air pushing out of the unit while your miner secures the hardest monetary network ever built.
Technical Specifications
| Specification | Details |
|---|---|
| Algorithm | SHA-256 (Bitcoin) |
| ASIC Chip | Bitmain BM1387 (16nm) |
| Hashrate (Stock) | ~13.5 TH/s |
| Hashrate (Undervolted) | ~7–9 TH/s |
| Power Draw (Stock) | ~1,350W |
| Power Draw (Undervolted) | ~600–800W |
| Heat Output (Stock) | ~4,600 BTU/hr |
| Heat Output (Undervolted) | ~2,000–2,730 BTU/hr |
| Noise Level | ~35–40 dBA (silent fans, comparable to a quiet office) |
| Input Voltage | 110–120V AC or 210–240V AC |
| Power Connector | Standard AC power cord (included), dedicated 10A circuit recommended |
| Connectivity | Ethernet (RJ45) |
| Cooling | 2x silent 140mm fans (Noctua or Arctic P14 Max) |
| Enclosure | D-Central custom 3D-printed Space Heater enclosure |
| Power Supply | Silent APW3 PSU (included) |
| Recommended Room Size | 100–250 sq ft (stock) / 75–150 sq ft (undervolted) |
| Operating Temperature | 0–40°C (32–104°F) |
| Operating Humidity | Below 75%, non-condensing |
| Warranty | 90 days (D-Central prioritized repair service) |
Mine Bitcoin, Heat Your Home
Every electric heater on the market does exactly one thing: convert electricity into heat. The Antminer S9 Space Heater Edition does two things: it converts electricity into heat and it mines Bitcoin. The physics are identical — a 1,350W resistive heater and a 1,350W ASIC miner both produce ~4,600 BTU/hr of heat. But the miner stacks sats while it warms your room.
This is the core thesis behind D-Central’s Space Heater line: if you are going to spend money on electricity for heating anyway, you should be mining Bitcoin with that energy first. The heat is a guaranteed byproduct. The Bitcoin is a bonus that accumulates over time. As electricity costs rise and Bitcoin’s scarcity increases, the economic case for mining-as-heating only strengthens. Read our full 5-year cost comparison between Bitcoin space heaters and traditional electric heaters for the detailed breakdown.
Whisper-Quiet Operation
Stock Antminer S9 units are notoriously loud — 75+ dBA, roughly the volume of a vacuum cleaner running nonstop. That is acceptable in a warehouse. It is not acceptable in your living room. D-Central replaces the stock high-RPM industrial fans with premium silent 140mm fans (Noctua or Arctic P14 Max), cutting noise output to ~35–40 dBA. That is quieter than a typical refrigerator and comparable to a quiet office or library.
The custom D-Central enclosure is engineered for optimized airflow at low fan speeds. Air enters through the intake, passes across the three BM1387 hashboards, and exits as warm, circulated air — all without the jet-engine whine of stock cooling. You can run this unit in a bedroom, home office, or living room without it dominating the acoustic space.
Plug-and-Play Ready
The S9 Space Heater Edition ships fully assembled and pre-configured. Open the box, connect the Ethernet cable to your router, plug in the power cord, point it at a mining pool, and you are hashing within minutes. Every component — the reconditioned Antminer S9, the silent APW3 power supply, the custom fans, and the D-Central enclosure — comes pre-installed and tested.
Each unit undergoes D-Central’s reconditioning process: full disassembly, cleaning, inspection of every hashboard and component, reassembly with silent cooling, and a 24-hour burn-in stress test. When it arrives at your door, it has already proven it can hash reliably. For detailed setup instructions, see our Bitcoin Space Heater Assembly Guide.
Built for Canadian Winters
D-Central is headquartered in Laval, Quebec, where winter temperatures regularly drop below -20°C. We designed the Space Heater line for exactly this climate. When outdoor temperatures plunge, your heating demand spikes — and so does the value proposition of mining-as-heating. At full power, the S9 Space Heater Edition outputs ~4,600 BTU/hr, enough to meaningfully heat a small room or supplement existing heating in a larger space.
During shoulder seasons (fall and spring), undervolting the S9 to ~600–800W reduces heat output to ~2,000–2,730 BTU/hr while still mining at ~7–9 TH/s. This gives you granular control over your heat output without turning the unit off entirely. In summer, you can undervolt further, relocate it to a basement or garage, or simply power it down. Use our BTU Calculator to determine the right power setting for your room size and climate.
Undervolting for Efficiency
The Antminer S9 is one of the most flexible ASIC miners for undervolting. By reducing the voltage supplied to the BM1387 chips, you lower power consumption (and heat output) while maintaining a proportionally higher hashrate-per-watt. At ~600W undervolted, the S9 achieves roughly the same efficiency (J/TH) as it does at stock — but with significantly less noise, less heat, and lower electricity costs.
This tunability makes the S9 Space Heater Edition a four-season appliance. Full power in deep winter. Moderate power in fall and spring. Low power or off in summer. You control the balance between hashrate, heat output, and electricity cost. For a detailed breakdown of electricity costs at various power levels, check our Mining Profitability Calculator.
What’s Included
- 1x Antminer S9 — Fully reconditioned, stress-tested for 24 hours, ~13.5 TH/s SHA-256
- 1x D-Central Custom Space Heater Enclosure — 3D-printed in Canada, optimized airflow design
- 2x Silent 140mm Fans — Noctua or Arctic P14 Max (premium, low-noise cooling)
- 1x Silent APW3 Power Supply — Noise-reduced PSU with stable power delivery
- 1x Power Cord — Standard AC power cable, ready to plug in
- Setup documentation — Quick-start guide with pool configuration instructions
Note: Ethernet cable not included. A wired Ethernet connection is required (WiFi adapter sold separately).
Heat Coverage by Power Level
| Power Mode | Wattage | Hashrate | BTU/hr | Room Size | Best For |
|---|---|---|---|---|---|
| Full Power (Stock) | ~1,350W | ~13.5 TH/s | ~4,600 | 150–250 sq ft | Deep winter, primary heating for small rooms |
| Medium (Undervolted) | ~800W | ~9 TH/s | ~2,730 | 100–175 sq ft | Moderate cold, shoulder seasons |
| Low (Undervolted) | ~600W | ~7 TH/s | ~2,050 | 75–125 sq ft | Mild cold, supplemental heating, year-round mining |
1 watt = 3.412 BTU/hr. All heat generated by the miner is released into the room. Use our BTU Calculator to match your exact room dimensions and climate zone.
Compare Space Heater Editions
| Model | Algorithm | Hashrate | Power | BTU/hr | Price |
|---|---|---|---|---|---|
| S9 Space Heater (this unit) | SHA-256 | ~13.5 TH/s | ~1,350W | ~4,600 | $235 |
| L3+ Space Heater | Scrypt | ~504 MH/s | ~800W | ~2,730 | $295 |
| S17 Space Heater | SHA-256 | ~56 TH/s | ~1,500–2,200W | ~5,100–7,500 | From $530 |
| S19 Space Heater | SHA-256 | ~95 TH/s | ~3,250W | ~11,000 | $2,500 |
Looking for help choosing the right model? Read our guide on the best miners for space heaters or check our full Bitcoin Space Heater collection.
Frequently Asked Questions
Q: How much does it cost to run the S9 Space Heater per month?
At full power (~1,350W) running 24/7, monthly electricity consumption is approximately 972 kWh. At a Canadian average of $0.10/kWh, that is roughly $97/month. Undervolted to ~600W, the cost drops to approximately $43/month. Keep in mind: this electricity cost replaces what you would have spent on a traditional electric heater anyway. The Bitcoin mined is the net gain. Use our Mining Profitability Calculator to estimate your specific costs and returns.
Q: How loud is it really?
With D-Central’s silent fan upgrade (Noctua or Arctic P14 Max), the S9 Space Heater Edition operates at approximately 35–40 dBA. For reference, a whisper is ~30 dBA, a quiet office is ~40 dBA, and a normal conversation is ~60 dBA. It is quiet enough to run in a bedroom while sleeping, though individual sensitivity to noise varies. This is a massive reduction from the stock S9’s ~75+ dBA.
Q: What room size can it heat?
At full power (~4,600 BTU/hr), the S9 Space Heater effectively heats a 150–250 sq ft room as a primary heat source. That is roughly the size of a home office, bedroom, or small living room. Undervolted to ~800W (~2,730 BTU/hr), it is more suitable for 100–175 sq ft. Room insulation, ceiling height, outdoor temperature, and window quality all affect coverage. Use our BTU Calculator for a personalized estimate.
Q: Is the S9 still profitable for Bitcoin mining?
In pure mining terms (electricity cost vs Bitcoin mined), the S9 is not profitable in most regions when you pay full price for electricity. But that calculation changes completely when you factor in heating. If you would have spent the electricity on a traditional heater anyway, the S9’s electricity cost is already « paid for » — and any Bitcoin earned is pure upside. This is why the Space Heater model works: it reframes the S9 from an unprofitable miner into a zero-marginal-cost Bitcoin accumulation tool.
Q: How hard is it to set up?
Extremely easy. The unit ships fully assembled and pre-tested. Setup takes approximately 10 minutes: connect the Ethernet cable to your router, plug in the power cord, access the miner’s web interface through your browser, and enter your mining pool credentials. No soldering, no flashing firmware, no command-line work. If you can set up a WiFi router, you can set up this miner. See our Assembly Guide for step-by-step instructions.
Q: What maintenance does it require?
Minimal. Blow compressed air through the unit every 3–6 months to clear dust from the heatsinks and hashboards. Keep the area around intake and exhaust vents clear for proper airflow. Monitor your mining pool dashboard occasionally to confirm stable hashrate. The reconditioned BM1387 chips and silent fans are designed for continuous 24/7 operation. If you ever need service, D-Central offers prioritized ASIC repair for all units sold.
Q: What warranty is included?
Every S9 Space Heater Edition includes a 90-day warranty covering hardware defects and component failures. D-Central provides prioritized repair service — if something goes wrong, your unit moves to the front of our repair queue. Security seals must remain intact for warranty validation. For issues outside the warranty period, our ASIC Repair service is available with model-specific expertise on the Antminer S9.
Q: What electrical circuit do I need?
The S9 Space Heater Edition works on standard North American 110–120V outlets or 210–240V circuits. A dedicated 15A circuit is recommended at 120V to avoid tripping breakers, especially at full power (~1,350W = ~11.25A at 120V). At 240V, the current draw drops to ~5.6A, well within any standard circuit’s capacity. Do not run the unit on an extension cord or power strip — connect directly to a wall outlet. Read our electrical requirements guide for complete details.
Q: Can this actually replace my regular space heater?
Yes. At ~4,600 BTU/hr (full power), the S9 Space Heater Edition produces the same heat as a standard 1,350W electric space heater — because the physics are identical. Every watt consumed becomes heat regardless of whether the device is a resistive element or an ASIC chip. The practical difference is that the S9 produces steady, continuous heat (not intermittent cycling like some ceramic heaters) and adds Bitcoin mining as a secondary function. For larger rooms, consider pairing two units or stepping up to the S17 Space Heater Edition.
Q: How long will the S9 last?
The Antminer S9 was released in 2017 and remains one of the most produced ASIC miners in history, with millions of units still running globally. The BM1387 chips are proven workhorses. With proper maintenance (dust cleaning every 3–6 months, stable power supply, humidity below 75%), an S9 can run continuously for years. D-Central’s reconditioning process and 24-hour stress test ensure you receive a unit that has been verified for reliable long-term operation. When repairs are eventually needed, D-Central has the deepest S9 repair expertise in North America.
Why D-Central
D-Central Technologies has been building, repairing, and hacking Bitcoin mining hardware since 2016. We are Canada’s Bitcoin Mining Hackers — taking institutional-grade mining technology and engineering it into accessible solutions for home miners. The Space Heater Edition line was born in our Laval, Quebec workshop, where Canadian winters demanded that we find a way to make mining heat useful instead of wasted.
Every unit is reconditioned, tested, and assembled by our team. When you buy from D-Central, you are not getting a generic product from an anonymous overseas warehouse — you are getting hardware backed by real ASIC repair expertise, a real Canadian company, and real people who answer when you need support. If your miner ever needs service, our ASIC Repair team handles over 38 models with prioritized service for D-Central customers.
Every hash counts. Whether you are stacking sats, heating your home, or both — the S9 Space Heater Edition puts your electricity to work. Explore our full collection of Bitcoin Space Heaters, calculate your heating needs with our BTU Calculator, or browse our complete guide to choosing the best miner for your space heater.
Open-Source Blueprint
True to our cypherpunk values, the Space Heater enclosure design is fully open source. Download the 3D-printable blueprint from the D-Central website and build your own, or purchase it fully assembled here with a reconditioned S9, silent fans, and everything you need to start mining and heating immediately.
Shipping, Warranty & Policy
3D-printed enclosure: The custom case is printed on demand. Please allow a few additional business days for processing before shipping. Ignore carrier-estimated delivery dates until tracking shows the package in transit.
Shipping: Prices exclude shipping fees, taxes, and customs charges. International buyers should verify local import regulations.
Final sale: Due to cryptocurrency market fluctuations, all sales are final. By purchasing, you agree to D-Central’s return and refund policy.
Shaun Patterson (client confirmé) –
This product is incredible, very satisfied.
ttales (client confirmé) –
Very happy. Thank you.
zachary564 –
Works great!