I'm from Pickering as well, so thank you for the question. My family still lives there. I was there this past weekend.
You're describing geoexchange. There's a whole other association called the Canadian GeoExchange Coalition, versus CanGEA geothermal energy. The energy we're talking about is literally the energy source radiating from the centre of the earth. Geoexchange is the ability of very shallow earth to store solar energy that then gets trapped a few metres down. They actually just exchange very low level degrees, for example 10° to 12°C, which goes back and forth into buildings and houses. Geoexchange is not geothermal energy, which is what we're speaking about.