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Practical Steam

Practical Steam builds a new generation of steam engines, designed to increase efficiency of steam systems, use waste heat and produce power

  • Stage Prototype Ready
  • Industry Clean Technology
  • Location Seattle, WA, USA
  • Currency USD
  • Founded November 2010
  • Employees 3
  • Website

Company Summary

The company’s proprietary, high-efficiency reciprocating steam engine provides an economical solution for sub-megawatt applications for which existing steam turbine generators are too expensive and inefficient. The company’s initial target markets are district heating and commercial and industrial site applications where co-generation opportunities can pay off in 2 to 3 years (and less with green energy incentives).


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    David Thacher

    David Thacher serves as Board Chair and advisor to the company, drawing on his engineering management and technical marketing experience from 18 years at Microsoft. Mr. Thacher is currently an active angel investor in the Seattle venture community.

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    John Rose

    Mr. Rose spent most of his career, including eight years as President and CEO, at Seattle-Northwest Securities Corporation, a major regional broker and underwriter of municipal bonds. Currently he consults with public and private clients on public finance matters as part of The Leora Consulting Group and also serves as Director of Manzanita Capital, the parent company of regional brokerage firm McAdams Wright Ragen.

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    Bill Hunter

    Bill Hunter became President of Practical Steam in December, 2011, and is responsible for general management of the business as well as marketing outreach. He is also the President and Owner of AirClean Technologies (ACT) which he founded in 1999 and is the principal engineer for its sister company, AirClean Engineering LLC, for performance of industrial energy efficiency audits. He is a registered engineer in the state of Washington

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    Joshua Tolbert
    Chief Technology Officer

    Joshua Tolbert became the company’s Chief Technology Officer in 2013. Josh has two master’s degrees in engineering, and is a doctoral candidate, expecting to receive his PhD in late 2013 from the University of Alabama. He has significant expertise in reciprocating engines, engineering design and thermodynamics.


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    Patrick Franke, Lane Powell
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    Mark Hanson, Bader Martin