value adding - the heat byproduct another use, page-8

"Why did Crest install one unit in one house? If the company is positioning itself for further possible sales in this market as a spinoff of the new efficiency regulations then great, but I'd love to hear something officially."

As a showpiece. There were other companies involved as well (I think around insulation, water saving etc). With consortium work, progress is always slow. And it will be Crest who will determine the rollout (if any), in line with how great demand is.

If it succeeds, it will open the floodgates :-)