Sackville's ventilation turbine and original equipment

Was the ventilation turbine aboard HMCS Sackville original equipment or a later addition?

Most of the equipment is original, although Sackville received some additions during the 1940s.

Most of the equipment displayed aboard HMCS Sackville, including the ventilation machinery in question, is described as original. The ship did receive some additions during the 1940s, so a preserved warship can combine as-built machinery with changes made during active service. Ventilation was also essential to making crowded machinery and accommodation spaces usable.