See Drake Landing in Alberta 2012. They used sand storage to heat 52 houses with 97% efficiency. Worked for years, then they ripped it all out and switched to gas.
Toronto downtown office buildings are cooled by lake water in summer, cutting AC electricity by 75% and eliminated AC brown outs, since 2005.
See Drake Landing in Alberta 2012. They used sand storage to heat 52 houses with 97% efficiency. Worked for years, then they ripped it all out and switched to gas.
Toronto downtown office buildings are cooled by lake water in summer, cutting AC electricity by 75% and eliminated AC brown outs, since 2005.