Trade magazines come for free to engineers; in the hopes that I will design in soem of their advertised products. I get a bunch of them (light reading, LOL).

I don't know if we were the first, but the feds did come to look at it! We got an efficienccy reting of 7.5, when the best on the market were running bairly 3. Thatprogram got a LOT of donations, shortly after that! The unit I am looking at for the new land, is running an efficiency rating of 22, so a lot has changed. :)

Yes they can heat and cool a house off grid. I did a post yesterday on that. Look at the post on the Earth Battery.

The link is an Amazon for sale link. They are WAY too expensive right now, but will come down a LOT, once they work out the business model.