It seems extremely wasteful to me to be focusing on the building envelope aspect of deep energy retrofits in Canada…since our electric grid is mostly renewables…the extra cost likely doesn’t justify just adding a slightly bigger heat pump and putting the money to adding more power to the grid…
In any case, the big win is moving off gas onto electric…so focus on the heat pump installation and if we run into problems down the road with power generation we can refocus onto building envelope and reduce the use of heat pumps at that point…
Building envelope really matters when you are staying on gas…because it can significantly reduce usage…but I don’t think that’s the fast with heatpumps.
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