Heatbit Bitwater: A Water Heater Element That Mines Bitcoin

US company Heatbit has unveiled Bitwater, a water heater element that mines Bitcoin while it heats water. Owners don't need a new appliance: the part screws into a compatible electric tank they already have.

Mining relies on specialized computers performing calculations, and a successful result earns a Bitcoin reward. Those calculations consume electricity and generate heat, much like a laptop running for hours. Normally that heat has to be removed. Bitwater puts it to work instead. The element contains 20 small mining chips, and the heat they produce while computing warms the water in the tank.

A companion app shows water temperature, mining status and earnings. Heatbit previously sold products that use mining heat for space heating, and Bitwater extends the idea to water for showers and baths.

Price and availability

The first production run is available for preorder at $899. Shipping is planned for January to March 2027, and delivery is limited to the United States and Canada.

Earnings are far from guaranteed

Mined Bitcoin goes to an address the user controls, but income is not predictable. The default setting is solo mining, where the device competes alone: a successful calculation brings a large reward, while failure brings nothing. Users can switch to a pool, where participants share the work and split rewards.

An estimate by Decrypt puts revenue at roughly 200 yen (about $1.30) per day at maximum performance, before electricity and other costs. Actual returns depend on Bitcoin's price and mining difficulty, and the manufacturer does not guarantee any profit. Whether the purchase price can ever be recouped is unclear.

Reusing heat that would otherwise be wasted is a clever idea, but buyers should treat Bitwater as an experiment in efficient heating rather than a sure way to earn money.