Distance from a balanced flue

[Spark123]

Hi,
One for the RGIs, what is the minimum distance between a ballanced flue and a vent for a fan? I have a feeling it is 1m but before I get my core drill out thought I'd double check!
Cheers

 

[oph]

Balanced flue natural draught should be 600mm from memory.

Fan flued is 300mm

 

[Spark123]

It is a fan flue,
Thanks

 

[Spark123]

Would it matter if it is directly above? (Will cover flue whilst drilling)

 

[oph]

what as in closer than 300 even though itas above you mean?

 

[Spark123]

Will be further than 300mm but directly above