SunBit Bitcoin Boiler
- Hashrate
- —
- Power
- 10.6 kW
- Efficiency
- —
- Noise
- —
from $16,134 Check store
Water heater Floor standing In production
Constellation Heating Constellation Heater 600T
The largest model of a bitcoin-mining boiler from Quebec's Constellation Heating, marketed mainly as a pool heater: S21 miners sit in Liquid21 immersion fluid, and a titanium heat exchanger passes their heat to pool water, process water or a glycol heating loop. It gives 12 kW of heat while mining 600 TH/s, on a 220/240 V, 50 A circuit. Sold by quote only, for professional installation in Canada and the continental US, with a 12-month limited warranty.
Hashrate600 TH/s worst 250 GH/sbest 1.16 PH/s 13th best of 197 (the bar uses a log scale)
Power (stock)12 kW lowest 11 Whighest 22 kW 4th highest of 199 (the bar uses a log scale)
Efficiency20 J/TH worst 100 J/THbest 8.9 J/TH 121st best of 195
Earns per kWh$0.076 worst $0.010best $0.171 120th best of 195
Heat output40,946 BTU/h worst 38 BTU/hbest 75,067 BTU/h 4th best of 199 (the bar uses a log scale)
Noise—
Price per TH—
Where to buy
No store listings yet. Know where to buy it? Tell us.
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 | Constellation Heating |
|---|---|
| Model | Constellation Heater 600T |
| SKU | — |
| Type | Water heater · Home * |
| Form factor | Floor standing * |
| Cooling | Immersion |
| Production status | In production * |
| Launch date | — |
| Hashrate | 600 TH/s |
| Power consumption (stock) | 12 kW * |
| Mining efficiency | 20 J/TH * |
| ASIC chip | Bitmain BM1368 (reported by an independent source) |
| Miner inside | Bitmain Antminer S21 (the maker says 'S21 ASICs included'; variant and number of miners per model not stated; the largest cabinet holds 3 miners) |
| Heat output | 40,946 BTU/h |
| Input voltage | 220/240 V (50 A circuit, NEMA 14-50 plug) |
| Frequency | — |
| Net dimensions (W × D × H) | — |
| Net weight | — |
| Noise | — |
| Operating temperature | — |
| Hot water | About 258 L (68 US gal) an hour, from 10 to 50 °C (our estimate) |
| Colours | — |
| Company based in | Canada |
| Made in | — |
* Not confirmed by the maker's own documents yet.
Heat modes
| Mode | Hashrate | Power | Heat |
|---|---|---|---|
| Eco | — | — | — |
| Normal | — | — | — |
| Auto | — | — | — |
Features
- S21 miners and Liquid21 immersion fluid included
- 12 kW continuous heating
- Fanless immersion cooling (maker says no noise)
- Titanium heat exchanger for pool water (chlorine or salt), process water or a glycol loop
- Fully modulating: Eco, Normal and Auto modes
- 8" 1024×768 capacitive touchscreen with live heater and blockchain display
- Ethernet or Wi-Fi (2.4 / 5 GHz)
- Phone app for control at home or remotely, no account needed
- Bluetooth setup; remote access over an encrypted Tailscale network run by Constellation
- Keeps heating and protecting itself without Constellation's servers
- Automatic software updates that roll back if they fail
- IP65 enclosure with over-temperature protection
- 220/240 V, 50 A circuit, NEMA 14-50 plug
- Miners run LuxOS firmware and mine on Luxor's FPPS pool
- Luxor pool fee 2.8% (product page) or 3% (terms), plus 3% to Constellation
- Weekly or monthly payouts to your own bitcoin address (minimum 0.001 BTC)
- Uses: pools, radiant floors, hotel and central water heating, maple syrup, micro-brewing
- Professional installation; Constellation checks the install before first start
- Components UL certified; the assembled unit is not UL or CSA certified
- 12-month limited warranty
Reviews
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Sources and data notes
- product page (200T/400T/600T at 4/8/12 kW, 200 to 600 TH with S21 ASICs included, Liquid21 fluid, titanium heat exchanger, chlorine and salt water, Eco/Normal/Auto, 8 in touchscreen, Ethernet or Wi-Fi, IP65, 220/240 V 50 A NEMA 14-50, Luxor 2.8% and Constellation 3% fees, 12-month warranty, 2-miner and 3-miner cabinet sizes, 'Quote on request' with no price, product photo) constellationheating.com
- homepage (models 200T/400T/600T, heat 4/8/12 kW paired with hashrate 200/400/600 TH, 600 TH top hashrate, fanless immersion cooling, titanium exchanger for process, pool or glycol water, phone control, use cases, interior photo) constellationheating.com
- terms and warranty, updated 2026-09-30 (Constellation Heating Inc., Quebec, Canada; for heating water or a heating loop; app needs no account, works at home or remotely; heater keeps heating without Constellation's servers; automatic updates with rollback; qualified installer and pre-start check required; assembled unit not UL or CSA certified; Luxor FPPS pool fee 'currently 3%', 3% Constellation share, weekly or monthly payouts, 0.001 BTC minimum; one-year warranty from delivery; Quebec Consumer Protection Act) constellationheating.com
- app privacy policy, updated 2026-09-30 (miners run LuxOS firmware and mine through a Luxor subaccount; Bluetooth setup; remote access over a Tailscale network Constellation manages; no account) constellationheating.com
- profitability calculator (600T listed as 12 kW; the page script's model table gives 600T = 600 TH and 12 kW and uses the 12 kW as energy used; pool fee 2.8%, Constellation fee 3%; USD or CAD) constellationheating.com
- about page (founder Nicolas Drouin-Audet; no founding year, factory or launch date) constellationheating.com
- contact page (Québec, Canada; quote request form; invites 'early adopters') constellationheating.com
- distributor page (no resellers named; fulfilment direct or via partner in Canada and the continental US; contractors install the 50 A circuit) constellationheating.com
- Oct 2023 blog post on an earlier 'Star Heater' pool heater by Nicolas Drouin (two immersed Bitmain S19s, 210 TH/s), linking to constellationheating.com; company background only, nothing on the 600T onbitcoin.substack.com
- Corporations Canada federal company record: Constellation Heating inc. (also Constellation Chauffage inc.), corporation 1483013-0, incorporated 18 April 2023 under the Canada Business Corporations Act, registered office in Champlain, Quebec, director Nicolas Drouin-Audet, status Active, annual returns filed for 2024-2026 ised-isde.canada.ca
- Compass Mining podcast episode page, 29 April 2025, with founder Nicolas Drouin: chapters on pool-heating economics, S19 and S21 form factors and where Constellation's customers are; no figures www.audioscrape.com
- ASIC chip: product page: 'S21 ASICs included', '600T · 12 kW', 2- and 3-miner cabinet sizes constellationheating.com
- ASIC chip: homepage: 'S21 miners included'; 600 TH top model; no variant named constellationheating.com
- ASIC chip: calculator model table: 600T = 600 TH, 12 kW; no miner fields constellationheating.com
- ASIC chip: Braiins OS hardware table: 'Antminer S21' = BM1368, 3 hashboards x 108 chips academy.braiins.com
- ASIC chip: D-Central S21 repair guide: BM1368, 108 chips per hashboard, 3 hashboards; S21 Pro/XP use BM1370 d-central.tech
Not yet confirmed from the maker's own documents: power (12 kW is the published heat output; the maker's calculator uses it as the energy drawn, but no wall-power figure is published); efficiency (not published; 12 kW / 600 TH/s is about 20 J/TH); dimensions (the page lists a 2-miner cabinet, 27.7 x 22.6 x 17.2 in / 704 x 574 x 437 mm, and a 3-miner cabinet, 35.8 x 22.6 x 17.2 in / 909 x 574 x 437 mm, but does not say which model uses which); form factor (taken from the product photo: a cabinet on four feet); heat modes (no hashrate or power published for Eco, Normal or Auto); weight (not published); noise (maker says no fans and no noise, but gives no figure); operating temperature (not published); frequency (not published); where it's made (not stated); launch date (not published); production status (sold by quote with full specs and terms for delivered heaters, but the contact page invites 'early adopters' and no lead time, stock or installations are shown; a 2025 podcast discusses where Constellation's customers are, so earlier heaters were sold, but no outside source shows a 600T delivered); features (Luxor pool fee: 2.8% on the product page and calculator, 'currently 3%' in the terms); store listings (none: the maker sells by quote and publishes no price); colours (none named; the photo shows a light grey cabinet with a black front corner panel); images (the maker's photos are not labelled with a model); category (also marketed for hotels, maple syrup and micro-brewing).
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