DOWN a.
d; going down; sloping; as, a down stroke; a down grade; a down train on a railway. Down draught, a downward draft, as in a flue, chimney, shaft of a mine, etc. -- Down in the mouth, chopfallen; dejected.
EXHAUST a.
that is released from the cylinder of an engine after having preformed its work. Exhaust draught, a forced draught produced by drawing air through a place, as through a furnace, instead of blowing it through. -- Exhaust fan, a fan blower so arranged as to produce an exhaust draught, or to draw air or gas out of a plac…