I grew up in a "manufactured home" and have been shocked by the ambient draftiness in every site-built house I've inhabited since. Similarly rated materials end

I grew up in a "manufactured home" and have been shocked by the ambient draftiness in every site-built house I've inhabited since. Similarly rated materials end up with nowhere near as tightly sealed an end result. Now I'm in an extremely high-efficiency condo, and while there are certainly no drafts, air sensors confirm the windows don't open enough to get decent ventilation. Makes me miss the huge banks of properly openable windows on the manufactured home...