Promethean Innovations
Every watt of compute ends as heat. We make sure it lands somewhere useful.
Data centers spend up to 40% of their power getting rid of heat.1 The rest of the world spends almost half its energy making it.2 Promethean closes the loop: compute that heats, heat that pays.
1. US Department of Energy, COOLERCHIPS announcement (2022)2. IEA, Renewables 2025, renewable heat
The opportunity
We throw away two of our most valuable resources.
Compute is growing fast
Data centers consume around 400 TWh a year and are expected to double by 2030.3 Cooling that hardware takes up to 40% of the power draw and cost.1
Heat demand is enormous
Heat is almost half of all the energy the world uses,2 and space heating alone is a third of what a US commercial building burns.4 Almost none of it is reused heat.
Big deployments are slow
A conventional data center is all-or-nothing. Approval takes months or years, and it may not come. Smaller, distributed deployments carry less risk and reach market faster.
3. IEA, Energy and AI (2025)4. US EIA, energy use in commercial buildings (2018)
The concept
Compute is a heat source.
Server-grade hardware sits in homes and businesses and serves as the heat source. Our patent-pending technology captures that heat and delivers it as comfort or process heat. The computation earns rewards, and the rewards offset the electricity bill.
- Compute does paid work. A work provider assigns the load. The chips release heat as they run.
- We capture it. Our patent-pending hydronic system routes the heat through exchangers, not out to the air.
- Heat goes where you need it. Comfort heat, process heat, or a dry cooler when nothing needs warming.
- The work pays. Rewards for the computation offset the electricity it uses.
Two ways in
Heatoshi
Our retail product. The world's first self-contained residential hydronic heater based on computationally generated heat. For homes, offices, pools, and barns.
Commercial installations
Engineered heat-recovery compute systems for hotels, warehouses, food production, multi-unit buildings, and other sites where heat is a line item.
Who we are
Built by people who have commissioned the boilers,
shipped the software and run the kitchen.
We believe the energy transition is mostly a plumbing problem: the heat already exists, it is just in the wrong place. We would rather fix that than argue about it.
Most heat-reuse projects spend their budget moving heat across a city. We skip the trip and put the compute into a hydronic loop someone already pays to run. That is a design, build and commission problem. We have done each for a living.
Between us: a licensed Professional Engineer who spent a decade commissioning mechanical, electrical, plumbing and fire-protection systems and wrote the study guide for Decarbonization Professionals. Engineering leadership at businesses that scaled to nine-figure revenue. A production lead who went from owning a bakery to building commercial fusion generators. And the go-to-market that turns a heater into a business.
Every one of us has owned a business and signed the front of a check. That is the whole job.