Leslie Thomas was manager of energy services at Guelph Hydro Electric Systems when he first learned of the enormous potential of "earth energy" technologies, commonly known as low-temperature geothermal systems.
He had attended a trade show in 2002 where geothermal technologies were on exhibit. Impressed by what he saw, Thomas was surprised to learn later that Guelph Hydro's headquarters didn't rely on natural gas for heating or electricity for cooling. Most of that energy came from a geothermal system installed in the mid-1990s.
"This inspired me," says Thomas, an engineer who later oversaw the expansion of Guelph Hydro's "geo" system as part of an addition to its headquarters.