extractor kitchen inline

Hi - I'm installing the ducting for a holiday let with extractors in the two en-suite shower/wet rooms, a kitchen and a shower attached to a sauna. I've sized them all and am looking at in line duct fans for the two shower/wet rooms of about 240m3/hr and about 25dBa at 3m. This is over spec...

Hi all, I have to have a fairly long duct run for my kitchen extractor hood and the bathroom extractor will also join onto this run. To avoid smells getting into the bathroom, and to ensure the kitchen extractor works well, I was considering putting an inline fan after the join and wiring it to...