Investors
Two markets, one machine.
Nearly half the energy on earth goes to making heat.1 Data centers are set to double their electricity use by 2030.2 One market pays to make heat. The other pays to get rid of it. We sell them the same machine.
1. IEA, Renewables 2025, renewable heat2. IEA, Energy and AI (2025)
Why now
The world is ready and waiting for computationally generated heat.
The hardware arrived
The product is now possible. Current compute hardware can output roughly 180°F, hot enough for hydronic comfort and process heat.
Decarbonization pays
Households get a reason to leave gas. An electric heater that earns gives them one, and can replace recently repealed solar incentives.
The grid wants it
Capacity is no longer the obstacle. New homes have more electrical capacity than ever, and networked equipment responds to grid conditions.
The cloud goes local
Smaller wins on timing. Distributed compute is on the rise, and smaller deployments are less risky and faster to market than a data center.
Our advantage
IP and trademarks
- Patent
- Patent pending, with broad utility.
- Brand
- Heatoshi®
- Tagline
- Have Fun Staying Warm™
Safe, clean, efficient
- Safety
- Safer than fossil-fuel heating.
- Clean
- Cleaner than fossil-fuel heating.
- Efficiency
- Efficient on its own. Pair it with heat pumps or solar for more.
Our competition
- Gas boiler
- Low cost, low efficiency, no reward.
- Heat pump
- High cost, high efficiency, no reward.
- Heatoshi
- Subsidized cost, high efficiency, significant reward.
Our ask
We're stealing fire from the gods. Are you in?
Promethean is raising a seed round. Terms, financials, pipeline and technical detail are shared under NDA. Tell us a little about your fund and we will follow up with the data room.