Are you planing on doing it yourself?
There are a few places that sell dual coil water heaters that the panels hook up too. Most of these places are the distributors though. I know they are expensive but Viessmann has a system.
http://www.viessmann.ca/web/canada/c...eme_ca_english
There are a few plumbers around Calgary that deal with them. I have found that most of them come from a European background and seem to be very knowledgable with the stuff. Don't know if that helps at all though.
I'll see if I can find a number for one of the plumbers if your instrested.