It was older so I doubt it was a cold climate, but some professional thought it was good enough for MD winters.
I would question what indoor temperature those countries feel is acceptable. Europeans have a different idea of indoor comfort than much of the US, given the very old buildings and lack of central (or any) AC and central heat, they may find 55 or 60 degrees inside on a cold winters day acceptable...me, not so much. LOL
Like a few others have said, I question the wisdom of putting all our eggs in the electric basket - in most places it is much more expensive than gas, our grids already can't handle the demands today, electric is the most susceptible to transmission issues, and a cyber attack could put us instantly back to the stone age. Just seems like not a great idea to me to not spread our energy needs over as many methods as possible.