Pencil drawing of the Snorkel Hot Tubs HashTub Pro

Water heater Floor standing In production

Snorkel Hot Tubs HashTub Pro

A handcrafted cedar hot tub from Snorkel Hot Tubs of Seattle, kept warm by a bitcoin miner sealed in dielectric fluid inside a heat unit built by Hashrate House, with the tub's own electric heater as backup. Snorkel prices the Pro heat system (16 J/TH, about 4 kW of heat) at $5,895 on top of $12,265-$22,940 for the tub and options, although Hashrate House now lists the Pro as 17.5 J/TH at $4,395. You pay 2,100 sats to join a waitlist for a design consultation, then a 50% deposit to order.

Best price $5,895

New · Pre-order at Snorkel Hot Tubs

Pro bitcoin heat system only (16 J/TH); cedar tub and options $12,265-$22,940 extra ($24,930 as shown); join the waitlist (2,100 sats, non-refundable) for a design consultation, then a 50% deposit

Where to buy Maker's page

Reviews from Nostr ↓

Hashrate—
Power (stock)4,000 W 11 W22 kW 82nd highest of 199
Efficiency16 J/TH 100 J/THbest 8.9 J/TH 69th best of 195
Earns per kWh$0.095 $0.010best $0.171 68th best of 195
Heat output13,649 BTU/h 38 BTU/hbest 75,067 BTU/h 82nd best of 199
Noise30 dB 76 dBbest 25 dB 4th best of 68
Price per TH—

Where to buy

Store Trustpilot Condition Availability Listed price In your currency Per TH Checked
Snorkel Hot Tubs Ships from United States · Maker's own shop Pro bitcoin heat system only (16 J/TH); cedar tub and options $12,265-$22,940 extra ($24,930 as shown); join the waitlist (2,100 sats, non-refundable) for a design consultation, then a 50% deposit No score New Pre-order $5,895 $5,895 — 5 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
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Net cost per kWh of heat
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Solo: chance of a block per year
—
Earns per kWh, on 3-month averages
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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

BrandSnorkel Hot Tubs
ModelHashTub Pro
SKU—
TypeWater heater · Home
Form factorFloor standing
CoolingImmersion
Production statusIn production *
Launch dateFeb 2026 *
Hashrate—
Power consumption (stock)4,000 W *
Mining efficiency16 J/TH *
ASIC chipBitmain BM1368 × 324 (reported by an independent source)
Miner insideBitmain Antminer S21, per Hashrate House's calculator, in Hashrate House's immersion heat system
Heat output13,649 BTU/h
Input voltage240 V (heat unit on its own: dedicated 30 A hardwired circuit; complete tub: dedicated 60 A GFCI spa circuit; miner rated 220 V, 30 A)
Frequency—
Net dimensions (W × D × H)262 × 495 × 523 mm (10.3 × 19.5 × 20.6 in) *
Net weight—
Noise30 dB *
Operating temperature—
Hot waterAbout 86 L (23 US gal) an hour, from 10 to 50 °C (our estimate)
Colours—
Company based inUnited States
Made inUnited States *

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

Features

  • Handcrafted Western Red Cedar tub by Snorkel
  • Miner pre-installed, submerged in dielectric fluid
  • About 4 kW of heat from the miner
  • Tub's 5.5 kW electric heater as backup
  • Tub setpoint up to 104 °F (40 °C) on the Balboa control
  • Cupronickel tube-and-shell heat exchanger
  • About 13 gal (50 L) of dielectric fluid supplied
  • Fanless sealed enclosure, 20.6 x 10.3 x 19.5 in
  • Needs a dedicated 60 A, 240 V GFCI spa circuit (licensed electrician)
  • Miner can be upgraded later
  • Heat unit also retrofits acrylic hot tubs
  • Same heat unit can heat home hot water or radiant floors (up to 140 °F / 60 °C)
  • 1-year warranty on the heat unit (18 months if registered)
  • Snorkel accepts bitcoin
  • Heatpunk Innovation Award 2026

Reviews

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Sources and data notes

Not yet confirmed from the maker's own documents: hashrate (not shown on Snorkel's page; its page script holds an unrendered 234 TH/s for the Pro, while Hashrate House's calculator lists the Pro as an Antminer S21 at 200 TH/s and 3.5 kW); efficiency (Snorkel and its waitlist page say 16 J/TH; Hashrate House, which builds the heat unit, lists the Pro at 17.5 J/TH); power (approximate: the manual and Hashrate House's page give a '~4 kW' miner for both packages; excludes the pump and the tub's 5.5 kW backup heater; the calculator says 3.5 kW for the Pro); store listings (Snorkel's page, last changed April 2026, lists the Pro at $5,895; Hashrate House's FAQ says the heat system sold by Snorkel is $4,395 for the Pro and $3,895 for the Pleb); dimensions (heat unit enclosure only; cedar tub sizes are not published on the HashTub pages); noise (Hashrate House's FAQ says its hydro and immersion systems run below 30 dB; a general claim, not a measured figure for the HashTub, and it leaves out the tub's own pumps); weight; operating temperature; frequency; where it's made (Hashrate House says the heat unit is designed and assembled in the USA; Snorkel gives only its Seattle workshop address for the tub; the miner is a bought-in ASIC); launch date (debut at Heatpunk Summit 2026; the 27-28 February date comes from the 256 Foundation post); production status (made to order through a waitlist with a small number of heating units; outside sources show only Snorkel's own install at The Space, Denver (finished 21 February 2026) and the Bitcoin 2026 floor model; in June 2026 Snorkel wrote that one soak 'lead to another Hashtub', but no customer delivery has been reported); colours.

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