There's a bit of a myth about the magnitude of heating emissions in Canada. GHG emissions from the residential sector in 2004 were 43 MT CO2eq (5.7% of Canada's total), primarily related to space and water heating. According to EC, this figure does not include biomass combustion, however, so it represents primarily consumption of distillate and NG. The inventory lumps the use of wood for residential heating together with emissions from forest fires. In any case, I imagine wood combustion is a small fraction of residential heating.

I agree that home and commercial AC is buried in electricity production, as is the growing use of heat pumps, where the electricity comes from non-renewables.