A sound attenuating duct unit (40) suitable for connection to an outlet of a gas turbine (10) and an improved heat recovery apparatus for use with such a turbine are disclosed. The former unit includes a duct housing (42) having exterior sides, an air inle...

Both air duct inlet silencers and air duct outlet silencers (18,20) for use with a stationary gas turbine (12) are disclosed. The inlet silencer (18) comprises a vertically extending duct structure (34) having an upper section (36) with a plurality of vert...