Can you use the Solar heater with earth tube, or would the heat coming through the tube go into the ground?
Have been browsing the different sites looking for a good way to passively heat and cool my place, for winter times heating primarily. Was looking at the following instructable https://www.instructables.com/id/Solar-Heater/
when the above thought hit me. If I didn't want to cut into my wall to do the solor heater, is it possible to run it through earth tubes to provide the heating. Didn't know if you would have to much heat displacement coming through the tube going into the earth. Airflow is to be ran by a simple computer fan on low powered solar panel/battery