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Cool Energy

Turning wasted heat into clean electricity with up to 100% IRR.

  • Stage $1M in TTM Revenue
  • Industry Clean Technology
  • Location Boulder, CO, US
  • Currency USD
  • Founded March 2006
  • Employees 6
  • Incorporation Type C-corp
  • Website

Company Summary

Cool Energy supplies devices to turn wasted heat to electricity, improving energy efficiency for off-grid diesel generators and industrial processes. Its unique low-temperature ThermoHeart engine has been developed over 5 generations of build, test, refine, and are patent-protected and delivered to customers in the US, EU, and China. Other applications include concentrating solar power and biomass producing clean renewable electricity.


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    Bill Gross
    BoD Member

    BoD member, founder of 100 companies, CEO of Idealab, active cleantech and social media incubator and investor.

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    Sam C Weaver
    BoD Chair

    40-year CE, Founder of 10 companies, current CEO of Proton Power, Inc.

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    Samuel P Weaver

    20-year startup veteran, engineering, sales, product development experience. 3 companies founded. Passionate about renewable energy.

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    Brian P Nuel
    Director of Engineering

    Excellent engineer with experience in engine design and test, medical devices, aerospace.


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    Hogan Lovells - Dennis Arfmann
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    Noviger, Ball, & Zivi

Previous Investors

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    Friends and Family
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    National Science Foundation, EPA, DOE
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