What is a our earth tube really contributing?

A deep dive into earth tubes with a detailed look at the data collected on the Walton house. A Passive Buildings Canada presentation, part of "High Performance Design Meets Boots on the Ground" - Toronto Ontario, March 11, 2020. Presenters: Yury Petyushin & Rob Blakeney.  Earth tubes are praised by some people as an infinite source of absurdly cheap energy and are cursed by others as a health hazard due to the potential risk of mould growth. How many earth tubes have been installed in Canada and how are they operating? What is data really showing us? After analyzing more than 300,000 data points from a real project, Rob and Yury are ready to share the results.