You seem to have concluded energy use for hot water cannot go lower by excluding any approach that would lower it, not because it's physically impossible, but simply because such technology isn't being used.
Isn't this a vacuous argument?
You seem to have concluded energy use for hot water cannot go lower by excluding any approach that would lower it, not because it's physically impossible, but simply because such technology isn't being used.
Isn't this a vacuous argument?