8"(200mm) Y splitter to 8" to 4" reducers?

W

waring192

Active Member
As above, I don't really want to core drill an 8" hole in my outside wall but quit happy to pop in a couple of 4" holes if it doesn't cause any problem with the airflow. The plan is to have my filter/fan (both are 8"/200mm) then have a Y splitter which then reduces ideally down to 4" or 100mm each and has them vent outside or maybe vent on back into the house so I can check for smells and also have a little 'free heat'.

Just wanted to know if the airflow will still be the same or similar to having a straight 8"pipe outside the house. Drill bits are not cheap and don't really want a hole that big sticking out of the house.

Cheers
 
Drop That Sound

Drop That Sound

Well-Known Member
There are rectangular ducting options too. And all the adapters you would need. Would look better on the side of a house to have a low profile square vent with louvers, than some big bulky 8" roof top looking vent..
 
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deejay123

deejay123

Well-Known Member
Plus If the extract is on a controller it won’t matter as much anyway as this will reduce fan speed and lower the airflow, mine rarely go above 20%
 
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