I worked as a framing carpenter decades ago.
I built my own house in the mid-2000's because I know how poorly designed and built homes in Canada are.
So I have a collegial respect for the reasons @EsTresidder did a deep #Passivhaus energy retrofit of his home that he discusses in the latest @TransitionShow show episode.
It is a lot of work but building a home that is comfortable and properly ventilated requires diligent effort.
https://www.cbc.ca/news/canada/hamilton/hvac-units-new-homes-1.7096920