We are replacing an Xpelair DX100 in the ceiling of a shower room in the loft, which is extracting vertically through a very short stack. The fan and its back-draught shutter are not able to handle the strong gusts that we experience here. After about 18 months with a clattering shutter, and progressively increasing bearing rumble when the fan is running, the fan motor has gone open-circuit.
Please can anyone recommend something that's more up to the job?