Hold up there pardner, homes producing more energy than they consume? That sounds vaguely communistic-like, and we don't take kindly to that sort of thinkin' round here. Just gonna hunker down and let the invisible hands of Jesus and the market take care of us 'cause this here's the greatest nation on the whole earth. /S

I meant to imply that thermal insulation is a prerequisite to any cooling tech, new or old. Looking at my comment again, I just worded it badly.

That's pretty cool. Getting modern insulation on older apartment blocks here in Romania is an uphill struggle. You need every occupant of the block to sign off on it, and that always results in massive headaches from someone who doesn't want to pay the 30 Euros per person.