Looked at a house yesterday built about 1950, single story, that ‘looked’ like a concrete foundation.
One return air duct was located in entry hall near center of house, but in examination, the ducting traveled down appx. 2’ below floor level and turned toward end of house where furnace was located. Looked into attic thinking they traveled the duct up in wall cavity, but did not find any evidence in attic.
Has anyone seen a full slab foundation with return-air ducting through slab, travel under slab, then through slab again to unit? :roll: