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@saidsoftly@retro.social That's fair, and retrofits vs. new builds is a big part of this discussion. Mostly I'm talking about new builds and best-practices.

But to be honest, the losses from ducts are another reason I think ductless mini-splits might start taking off.

Eliminate all the ceiling penetrations in the attic, insulate it more, and switch to a mini-split system and you can probably cut your energy use in half. That's nothing to sneeze at.