This system is cheap because it is fairly poor quality, the fan is noisier than expected, even on the lowest setting a hum can be heard in every room, when set higher it becomes too noisy for bedrooms.
Room outlets are too stubby, are awkward to fit within a dirty loft, especially as they require more substantial support than can be provided by the flimsy foil tape.
Excellent information on the website allows for easy choice for the correct fan. Very competitive prices with quick delivery makes for a fantastic service. Very many thanks.