In 1998, the Canadian government took part in a task force with the International Energy Agency. A study was done of the six existing technologies for solar collectors. We were involved in that and efficiency curves were developed for each collector, among other things.
Solarwall was not the most efficient system nor the least efficient one. It fell somewhere in the middle. Then programs such as RETScreen International, Solar Air Heating Project Analysis Training Module and SWift were established. They're available throughout the world, but they do not include this technology. That was a very good idea, a very good product, but we made the mistake of promoting this technology only, and of disregarding all the others. As a result, solar space heating did not take off as we would have liked.
So the time has really come to go back to the work the International Energy Agency was involved in, to look at what is available and to incorporate it as quickly as possible into all our programs.