So, in the winter we now have to blow cold air IN & blow warm OUT?? How efficient is that? Is the internal house air that we have been living in over the past half century, that bad that we have to resort to this?

Over regulation again I would say!!

My 1992 furnace has a cold air intake from outside that is routed into the cold air ducting at the furnace. I hope that I don't have to retrofit my house for this nonsense...

TAM