Exhaust Fan 150mm inline 6 inch Fantech 2 speed
Fantech 150mm silent exhaust fan TD500 I have two of these, they were installed then removed without being used. Two speed with plug lead. https://www.fantech.com.au/FanData.aspx?&RangeID=18&Pid=TD-500/150 Hi quality commercial fan and very quiet. From memory they cost about $450 each