An electric baseboard converts one kilowatt hour of electricity into one kilowatt hour of heat. There is nothing wrong with that and nothing clever about it either: a coefficient of performance of exactly one is what resistance heating is. A heat pump on the same meter, at the same price, at a coefficient of performance near four, buys the same heat for a quarter of the electricity.
Because both sides are billed at the identical rate, the price cancels out of the comparison entirely. The saving is one minus one over the coefficient of performance, which is about 74 percent at the top of NRCan’s published market range and about 52 percent at Canada’s regulated minimum. It does not matter how big the house is or which electricity plan it is on, and the calculator returns the same percentage whichever you set.
On the house NRCan describes, that saving is more than three thousand dollars a year, against an installed cost the GTA market publishes at $5,000 to $12,000. Fewer than four years, and often fewer than two. This is the Ontario household that should be reading about heat pumps, and it is not the one most of the marketing is addressed to.