I have a new manrose extractor fan in my ensuite that I hate. I didn't choose it, it was installed as part of my loft conversion package. It is noisy and draughty so I would like to change it. I think I want to change it to another manrose that has an automatic shutter. Youtube shows a very simple process of essentially swapping like for like since the manrose wiring is the same for the 2 models I'm looking at. However I am not an electrician! Can I do this or is youtube giving me a false sense of confidence! (I've got a Manrose Quiet and thinking of changing to manrose xf100at.)