It seems that insulation etc should be printable too. Spray insulation has been on the market for years, and that should be relatively easily adaptable to print

It seems that insulation etc should be printable too. Spray insulation has been on the market for years, and that should be relatively easily adaptable to printing. I don't see why ductwork shouldn't also be printable, and maybe even plumbing too (there are already PVC printers on the market). There are also designs like the Earthship that supposedly get by on passive heating and cooling and don't require HVAC. Certainly Dini's machine won't do all of this, but the approach is promising.