Backdraught shutter for 4 inch bathroom fan

[xyz123]

Hi, any suggestions on a backdraught (or is it backdraft) shutter to go with a 4inch fan. It's for an existing bathroom and I need to replace fan which seems to have a bearing problem. Fan will be envirovent silent 100t (like for like replacement). Obviously amazon has plenty of products but reviewed are mixed so just looking for some feedback.

Cheers

[biggiles]

In my limited experience it's been better to get fans with built-in shutters - all the independent ones I found on the market were cheap rubbish, with mechanisms that won't last the year.

[Ace-T]

https://www.meteorelectrical.com/brands/airflow/he...

We have two of these. Stops the wind whistling through the house entirely.

[sherman]

Ace-T said:

https://www.meteorelectrical.com/brands/airflow/he...

We have two of these. Stops the wind whistling through the house entirely.

We had one of these in our last house.
Great bit of kit.
You can spec them up quite easily too with different colour covers.

[dobly]

Manrose is a decent quality brand - they have the products you need.

[xyz123]

Thanks.