fan noise

Hey all, I have a Vortice Vort Leto MEV (I believe it's this one) that I'm having trouble with. When it's turned on, the fan quickly starts making a noise as if something is stuck in it, here's a video: Soon after, it just stops working, presumably the circuit board turns it off due to the...

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...