Heatbit's Bitwater turns a water heater into a Bitcoin miner

Heatbit has unveiled Bitwater, a replacement heating element that uses Bitcoin-mining chips to heat an electric water tank. The company is taking refundable pre-orders for an $899 Genesis batch, with later units priced at up to $1,299 and first shipments planned for the first quarter of 2027.¹

Instead of sending electricity through a conventional resistance wire, Bitwater runs mining hardware inside the heating element. The chips produce heat as they work, and that heat is transferred into household water. Heatbit says the unit can deliver up to 34 TH/s, draw up to 600 watts and use 20 BM1370 chips.¹

Bitwater is designed to screw into a standard 1-inch NPSM port on electric water heaters sold in the US and Canada. Heatbit lists compatibility with common brands including A. O. Smith, Rheem, Bradford White, State, Richmond, Whirlpool, Kenmore and GE. The company says the parts touching the water are lead-free and that the product includes a powered titanium anode, leak detection and app-based monitoring.¹

The company frames mining income as variable rather than guaranteed. Its product page says earnings depend on network difficulty and Bitcoin price, while the element can continue heating water if its internet connection drops. Bitwater is therefore an attempt to make an unavoidable household energy load do double duty.

Heatbit has not announced UK or European shipping. The current pre-order offer is for the US and Canada, with a refundable deposit and Q1 2027 shipping window.¹

Our opinion

Bitwater is unusually coherent crypto hardware because its main job remains useful when mining economics turn sour. The catch is that “free” heat is doing a lot of marketing work: homeowners still pay for the electricity, and Bitcoin returns will move with a volatile market. An $899 early order is a bet on installation, reliability and energy prices, not a guaranteed shortcut to passive income.