Heatbit Bitwater gives a familiar household appliance an unusual second job: mining Bitcoin. Heatbit’s new heating element replaces the lower element in a compatible electric water tank, using heat from mining chips to warm the water. The company is taking refundable preorders at $899 for its Genesis batch, with first shipments planned for the first quarter of 2027.
The appeal is easy to understand. An electric resistance water heater already consumes power to make heat. Heatbit proposes doing useful computing along the way, then putting the resulting heat into the tank. However, its claims about electricity bills and mining output still need to be considered alongside the household’s hot-water demand. Heat management also runs through our earlier coverage of mining room and rig cooling; Bitwater’s approach puts that heat into water instead.
What Heatbit Bitwater puts inside the tank
The element contains 20 BM1370 mining chips and a brass heat-transfer assembly. Heatbit advertises a maximum hashrate of 34 terahashes per second, power consumption of up to 600 watts, and efficiency starting at 12 joules per terahash. These are separate advertised limits, rather than a promise that every maximum applies simultaneously.
Water cools the assembly, eliminating the need for fans, according to Heatbit. The company’s Autotune system adjusts operation as conditions change. Heatbit says the original upper heating element and thermostat remain in place to help meet heavier demand.
A separate controller connects to a 110-240-volt outlet and links the device to Wi-Fi. Heatbit says its app shows water temperature, hashrate and earnings, with scheduling and remote controls. The package also includes a leak sensor that can trigger app and email alerts.
Compatibility matters more than the headline
Heatbit lists compatibility with many 30-80-gallon electric tank water heaters in the United States and Canada that have a one-inch NPSM screw-in element port. Its examples include A. O. Smith, Rheem, Bradford White, Whirlpool and GE. That is a defined compatibility claim, rather than a guarantee for every model those brands sell.
The current product is for electric tanks. Heatbit says versions for gas heaters and heat pumps are still to come. Its FAQ offers a model check through support for owners who are uncertain about their tank.
Although Heatbit markets installation as a DIY replacement, the process involves the water heater’s electrical connections and draining the tank. This announcement does not establish that a particular installation is suitable for an untrained homeowner. The company also lists an optional $99 video session with an experienced installer, available after the device arrives.
Bitcoin earnings remain a variable
Heatbit’s pitch depends on reusing heat a household actually needs. Its statement that heating costs stay the same is a manufacturer claim, not an independent measurement of every home’s electricity bill. A 600-watt rating alone cannot establish annual savings or a payback period.
Meanwhile, the company’s FAQ explicitly says mining earnings depend on Bitcoin’s price and network difficulty. It describes solo mining on Heatbit’s pool as the default, with the option to choose another pool through the app. That default is a relevant detail when weighing expectations about payouts; the product page does not promise a regular income.
Mining requires an internet connection, but Heatbit says water heating continues offline. The listed warranty runs for one year from shipment. Later batches are advertised at prices up to $1,299, so the $899 figure applies specifically to the initial preorder batch. For now, Bitwater is a preorder proposition with manufacturer specifications, rather than a product Tech My Money has tested.
