[tryan]

I dodn't think your cess pool would generate enough "renewable energy" ... considering the source of the warmth.

My installers father is a builder in Canada. He explained a planned community he's designing which would be 100% geothermal. Miles and miles of tubes would be run in every conceivable space (no need to go too deep ... just run more tubing shallow). Then each house would tap into these common tubes and run a water to water and/or water to air unit; then pump the cold water back into the loop. Here's the kicker ... he charges a "utility fee" for access to the tubes. A timeless source of income and all he maintains is the tubes in the ground. WOW.