Pencil drawing of the Heatbit Bitwater

Water heater Pre-order

Heatbit Bitwater

A replacement lower element for standard US and Canadian electric tank water heaters, with 20 mining chips cooled by the tank water. It draws up to 600 W and mines up to 34 TH/s. Refundable pre-order; Heatbit says first units ship in Q1 2027.

Best price $949

$27.91 per TH · New · Pre-order at Heatbit

Genesis batch pre-order (later batches up to $1,299)

Reviews from Nostr ↓

Hashrate34 TH/s worst 250 GH/sbest 1.16 PH/s 143rd best of 197 (the bar uses a log scale)
Power (stock)600 W lowest 11 Whighest 22 kW 156th highest of 199 (the bar uses a log scale)
Efficiency17.6 J/TH worst 100 J/THbest 8.9 J/TH 96th best of 195
Earns per kWh$0.086 worst $0.010best $0.171 93rd best of 195
Heat output2,047 BTU/h worst 38 BTU/hbest 75,067 BTU/h 156th best of 199 (the bar uses a log scale)
Noise—
Price per TH$27.91 worst $539.96best $1.82 100th 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
Heatbit Ships from United States · Maker's own shop Genesis batch pre-order (later batches up to $1,299) TrustScore 4.4 out of 5, 370 reviews New Pre-order $949 $949 $27.91 4 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
—

*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

BrandHeatbit
ModelBitwater
SKUBITWATER-G1
TypeWater heater · Home
Form factor—
CoolingWater (hydro)
Production statusPre-order
Launch date—
Hashrate34 TH/s
Power consumption (stock)600 W
Mining efficiency17.6 J/TH *
ASIC chipBitmain BM1370 × 20 (named by the device's maker)
Heat output2,047 BTU/h
Input voltage110–240 V (controller plugs into a wall outlet)
Frequency—
Net dimensions (W × D × H)—
Net weight—
Noise—
Operating temperature—
Hot waterAbout 13 L (3.4 US gal) an hour, from 10 to 50 °C (our estimate)
Colours—
Company based inUnited States
Made in—

* Not confirmed by the maker's own documents yet.

Features

  • Screws into a standard 1 in NPSM element port (30-80 gal US/Canada electric tanks)
  • 20 x Bitmain BM1370 chips
  • Fanless and silent (water-cooled)
  • Autotune balances heat and hashrate
  • Powered titanium anode
  • Leak sensor included
  • Heatbit app: temperature, hashrate, schedules
  • Mines solo by default, or to any pool
  • Best-case efficiency 'from 12 J/TH' (maker claim)
  • DIY install in about 30-45 minutes

Reviews

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Sources and data notes

Not yet confirmed from the maker's own documents: efficiency (only a best-case 'from 12 J/TH' is published); dimensions; weight; noise (maker says silent, no figure); operating temperature; frequency; where it's made; colours.

Spotted a mistake? Let us know.