Henry Johnstone, PE


Henry Johnstone, GLHN’s president, discovered an interest in sustainable energy when he moved to Arizona to study solar energy in the early 1980s. After earning both a B.S. and an M.S. in mechanical engineering, he began to focus on designing sustainable systems at healthcare and higher education campuses. Now, institutions nationwide who wish to design more sustainable and cost effective utility systems or use alternative fuel technologies seek out Henry’s expertise. He led the effort to design new thermal energy storage systems at universities throughout the Southwestern U.S., as well as in Alaska and Illinois. He also works with municipalities who want to explore options for district energy in their downtown locations.

In addition to his design work, Henry has presented papers on the theoretical and technical aspects of his work and is the author of many articles about the water-energy nexus—the effect of air conditioning use on our water supply. He regularly participates in GLHN’s symposiums for university facilities and maintenance personnel and has lectured internationally on topics related to combined heat and power, district energy, and energy economics. He is also a member of the Board of Directors of the International District Energy Association.

Henry continues to explore the practical applications of sustainable energy technologies—he’s currently designing and building his own net-zero cabin in the woods.

“It is incredibly rewarding to see our innovative designs incorporated into public buildings and then exceeding the anticipated energy savings. This is only possible when we develop a collaborative design environment with all stakeholders.”

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