Geothermal house air supply
I am trying to re-route my household fresh air intake to run under the ground and enter near the basement floor in order to warm it up in the winter and cool it down in the summer. I live in Wisconsin. I presently bring fresh air into the house constantly and route it to my furnace cold air return. For underground routing, I am concerned about radon gas and water getting into the tubing. I am also concerned about contamination of the air from the tubing.