Exhaust fan

Exhaust Ex*haust", a. [L. exhaustus, p. p.] 1. Drained; exhausted; having expended or lost its energy. [1913 Webster]

2. Pertaining to steam, air, gas, etc., that is released from the cylinder of an engine after having preformed its work. [1913 Webster]

{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 place, as out of a room in ventilating it.

{Exhaust nozzle}, {Exhaust orifice} (Steam Engine), the blast orifice or nozzle.

{Exhaust pipe} (Steam Engine), the pipe that conveys exhaust steam from the cylinder to the atmosphere or to the condenser.

{Exhaust port} (Steam Engine), the opening, in the cylinder or valve, by which the exhaust steam escapes.

{Exhaust purifier} (Milling), a machine for sorting grains, or purifying middlings by an exhaust draught. --Knight.

{Exhaust steam} (Steam Engine), steam which is allowed to escape from the cylinder after having been employed to produce motion of the piston.

{Exhaust valve} (Steam Engine), a valve that lets exhaust steam escape out of a cylinder. [1913 Webster]