Fan In Flat Warm Roof

[securespark]

Nah, it's actually fubarred!

So, what would your choice be?

I'm tempted to replace the fan with something similar..

IOW, the cheapest option, but there is of course a risk the replacement fan may go the same way.

 

[securespark]

Just having a chat with Mrs S about replacing the fan. There is a scant gap under the door.

I reckon it should be 20mm minimum. I have a theory that the lack of airflow has contributed to the premature deaths of these fans. I'd like to shave the door down before fitting a new fan, she wants a new fan and to leave the door as it is, as she hates draughts.

Would you say it is fair comment to shave the door down?

 

[JohnD]

20mm is double what you need.

 

[Mister Banks]

For a 10cm (4”) fan the gap under the door needs to be minimum of 78cm2.

 

[securespark]

Thanks.

It's a 150mm fan, if that makes any difference?

 

[Mister Banks]

Thanks.

It's a 150mm fan, if that makes any difference?

It does make a difference. For a 150mm (6”) fan the gap needs to be 177cm2 minimum.