m0useanswered grow question 3 years ago My first one broke that I bought via amazon, it was using the AC motor,
They replaced it with a EC motor version and its been working for for a while now just fine.
They have a lot of reversions on the same model. New ones also have Bluetooth in them and connect to an app.
Its the only one I have used, but I enjoy how quiet it is vs other inline fans in my house, stove hood and bathroom fans.