Fans
Manrose QF100T Quiet Extractor Fan with Timer complete with 3 metres of PVC Flexible Ducting and White External Grille Vent Cover
Incredibly quiet sound output of 27dB(A) @ 3m (60% better than "normal" fans) Timer over run model. Operates with room light switch, and continues to run on for pre-set time 21 litres per second, 75m3 per hour extraction rate. Power consumption 4.8W...
https://www.bizrate.co.uk/fans/manrose-qf100t-quiet-extractor-fan-oid27719165894.html