Why Push Air?

Once again I'm enlightened from the Podcast library - "This week in Free Energy No", by Sterling D Allan highlighted another very innovative company making a commercial and residential geothermal product. 

Geothermal - I thought one needed volcanic activity for this?

Lot to be said for simplicity - why over think everything?

http://www.earthlinked.com/

They just use the simple ambient temperature of the earth (in this case we can call it Dirt vs. Soil) about 30 feet down for heat and cooling systems - check out the install video!

vs. 

outside air that is radically hotter or radically cooler. 

Another base hit.