it would cost $4 million, as approximately $3 million was for one-time research and development. Optimal community size would be 200-300 homes to realize the economies of scale. The number of systems would remain the same; only the number of boreholes would need to increase. International effects A group of researchers from South Korea visited Drake Landing Solar Community in April 2012 to study the geothermal heating technology and how it can be applied to communities in South Korea, particularly ahead of the 2018 Winter Olympics in Pyeongchang. The main focus of this research trip was to learn about the economics and reliability of the technology. Performance On October 5, 2012 the DLSC set a new world record by covering 97% of space heating needs with solar thermal energy. In the 2015-2016 heating season, 100% of space heating needs were met with solar energy. See also List of energy storage projects References External links Drake Landing Solar Community Retrieved on September 30, 2009 Drake Landing Solar Community: Workings Retrieved on September 30, 2009 Planned communities Sustainable communities Okotoks Sustainable architecture Sustainable building Scientific organizations based in Canada Energy conservation Energy storage Residential heating Solar thermal energy Solar design Populated places established in 2012 Projects established in 2012 2012 establishments in Alberta