I just tried to a dummy run.
The back draught shutter stopped the airflow but it had to be at an angle to stop the flaps from being open. But then the extractor fan wouldn’t connect to the shutter so then the fan didn’t work.
This is what the outside looks like.
Reckon it would be easier...
Good Morning!
I’m hoping you can help.
In all My bathrooms the extractor fans are letting in a lot of cold air.
I bought a manrose back draught shutter to test out how much better It could be, but before I install it I want to make sure you wouldn’t recommend I do anything different( ducting ...