My neighbor's kid is selling them in Phoenix. It's a package deal where they do some sort of treatment to your ducts to seal them, put a capacitor on the house to "regulate" the flow of electricity, and then a Fafco Sungrabber(?) solar water heater to take it "off the grid". Supposedly it pays for itself in a couple of years. He's coming over tonight to give me a sales presentation. Anybody know anything about this stuff? TIA.