Round air bricks, ducting

[Russell griffiths]

Ok so I’m having a block n beam floor,

so telescopic air vents,connected to an air brick

 

now because I’m strange and like to be a bit special I would like round vents on the outside, these do not need to be brick shaped as I won’t be having any brickwork visible 

 

what im after are people’s thoughts on the type of flexible pipe to run in my wall void and down below the floor level

i was thinking about 100mm duct the heavy duty type for underground, not the white curly stuff you use on an extractor fan. 

 

What do you think, utter lunacy 

cheers russ. 

[PeterW]

You can get nice 68mm soffit vents that fit neatly into a standard downpipe connector so you can use cheap downpipe, couple of elbows and jobs done .... 

[Russell griffiths]

2 hours ago, PeterW said:

You can get nice 68mm soffit vents that fit neatly into a standard downpipe connector so you can use cheap downpipe, couple of elbows and jobs done .... 

 

Do you think 68mm would have enough volume and air flow to satisfy bc

i was thinking 100mm underground duct with 100mm round vents. 

[PeterW]

Use 68 and fit more..... ?

[Russell griffiths]

7 minutes ago, PeterW said:

Use 68 and fit more..... ?

 

Had thought of that, but I’ve got about 14 already so would prefer to not have them nearly every m around the house.