I don't remember if it was Poplar Forest or Monticello, but I vaguely remember something about Jefferson using convection to draw cool air through tunnels to he

I don't remember if it was Poplar Forest or Monticello, but I vaguely remember something about Jefferson using convection to draw cool air through tunnels to help cool the structure(s). Not related to ventilation, but I found the Trompe compressor to be an interesting example of forgotten technology