My thoughts exactly... I'm afraid I was not as clear as you in my post above. Yes, efficiency is good, but where, how, by how much, at what cost?

Just waving out the "Let's raise efficiency" slogan is reminding me of the good old socialist times. There were similar slogans back then, but not substantiated by anything meaningful... the caravan kept going pretty much like it always did.

Agreed.

I also find the assumption that the double-pane windows would be manufactured locally suspect.

As a US resident, I'd expect the jobs to be created in Mexico or China, were a double-pane mandate issued.