Small extractor fan

Has anyone come across an extractor fan designed for a 3" or 3.25" or 8cm duct (not sure which it's meant to be)? The duct is already there, and since it goes through an

18" solid wall, I'm not inclined to widen it. (It used to be a boiler flue.)

Ideally, a fan which went on the outside and sucked through the duct would be perfect, but I've never seen such a fan either.

Reply to
Andrew Gabriel
Loading thread data ...

80mm PC fan?

cheers, Pete.

Reply to
Pete C

|Has anyone come across an extractor fan designed for a 3" |or 3.25" or 8cm duct (not sure which it's meant to be)? |The duct is already there, and since it goes through an |18" solid wall, I'm not inclined to widen it. (It used |to be a boiler flue.) | |Ideally, a fan which went on the outside and sucked |through the duct would be perfect, but I've never seen |such a fan either.

Fit a slightly bigger fan and adapt the pipework. The worst which would happen is that the air would whistle as it went out.

Reply to
Dave Fawthrop

...Which would require a 12v supply.

Easy solution would be a standard ventilation fan, but to install it in a room sealed box - such that it would blow out through the existing duct. It would be anywhere near as efficient as one fitted in the correctly sized duct, but it would work and solve your problem.

Another way would be to use a cooker hood and adapt the outlet of that to fit your existing duct.

Reply to
Harry Bloomfield

4" ducted fan and a reduction manifold?
Reply to
John Rumm

80mm 240VAC fan?

Kim.

Reply to
kimble

Never, ever seen one.

5" (-ish) square 240v ones used to be quite common in the days of mainframe computers.
Reply to
Harry Bloomfield

You have now:

Search for RS Stock no: 498-003 on rswww.com

Reply to
John Rumm

formatting link

Reply to
kimble

HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.