4" extractor fans 5meters & 7meters

[TJC1]

Does anybody know of a 4" extractor fan than can do up to 5meter with one 90 degree bend in it?

Also a fan that will do 7meters with two 90 degree bends in it?

Looking at a new build in a old barn which they are using the old tin roof as the roof of the property. There is no access in the loft and they fans cant be inline....

 

[Andy78]

You'll need to be looking at centrifugal wall mounted ones for that. They'll be big, ugly, and noisy.

 

[Dave OCD]

Could a suspended ceiling with access hatch be constructed to make space for inline fans ?

 

[Toneyz]

You can get recessed centrifugal fans which would take the bulkiness away. Good fixing to keep the vibration down. We used to use Vortice Quatro in Barratt houses.

 

[S P]

This is the best I've found, says good for 6mtr or 4mtr with two right angles so maybe not enough but the most powerful standard fan.
Bathroom Fan Silent Tornado ST100T Zone 1 Extractor with Timer - https://www.extractorfanworld.co.uk/st100t-silent-tornado-hi-power-bathroom-fan-with-timer-3435-p.asp

 

[Des 56]

Monsoon UEC125 Five Inch External Centrifugal Extractor Fan - https://www.extractorfanworld.co.uk/monsoon-uec125-external-centrifugal-fan-125mm-390m3hr-3444-p.asp

 

[S P]

Okay Anthony, I'll bite!
On checking the specs on their website, mine beats their 'quadro micro 100'. However the "quadro super' annihilates it at 77 l/s or 280 m3/h!
Thanks, saved for future reference

 

[Toneyz]

Okay Anthony, I'll bite!
On checking the specs on their website, mine beats their 'quadro micro 100'. However the "quadro super' annihilates it at 77 l/s or 280 m3/h!
Thanks, saved for future reference

It's nothing to do with biting the only reason I disagreed with your choice of an axial fan in post 5 was the company that I used to work for fitted axial fans against ducting instead as the spec said centrifugal and I must have had to replace 30+ in peoples homes that were under the first year that they had moved in.