TD-Silent Series 5'', 6'' or 8'' Diameter Inline Mixed Flow Duct Fan, 203 to 530 CFM, 120V/60Hz by S&P| KitchenSource.com
Noiseblocker BlackSilentPro P1 80x25mm Ultra Silent Fan - 1500RPM NB-P1
Envirovent SIL100T "SILENT" Timer Extractor Fan for Bathroom or Kitchen 4" 100mm 798256074073 | eBay
S&P TD-500/150-SILENT-ECOWATT- Ultra-quiet inline fan 150mm dia with EC motor – Vent Store
Ultra Quiet Inline Duct Fan TD 160/100 N Silent S&P - Agroponix: Online store for Growing, Gardening, Hydroponics, Aquaponics, Aeroponics, Holticulture, Fertilizers & more
S&P duct fan TD500/150-160, silent, 329,90 €
Noiseblocker BlackSilentPro PR1 60x25mm Ultra Silent Fan - 1800RPM NB-PR1