Extractor fan comparison

joehat · Jan 14, 2016

Been looking extractor fans for bathroom getting damp from moisture, poor performance extractor I think, but been looking at inline ones and also kitchen ones, does anyone use kitchen ones, providing still suitable up ratings?

Octopus · Jan 14, 2016

joehat said:
Been looking extractor fans for bathroom getting damp from moisture, poor performance extractor I think, but been looking at inline ones and also kitchen ones, does anyone use kitchen ones, providing still suitable up ratings?

what is the question? This post doesn't make sense!

joehat · Jan 14, 2016

Question is at bottom saying does anyone use kitchen ex fans in bathrooms, if they need a higher extract rate to help keep the moisture our Ect.

Apologies if not clear.

Geordie Spark · Jan 14, 2016

Whatever fan you put in you need to make sure that you have air getting into the room (through a vent in the door or a gap under the door?) otherwise the bathroom will always be damp.

joehat · Jan 14, 2016

Yep, so extractor fan doesn't just create negative pressure, if I've worded that right,,

Octopus · Jan 14, 2016

Geordie Spark said:
Whatever fan you put in you need to make sure that you have air getting into the room (through a vent in the door or a gap under the door?) otherwise the bathroom will always be damp.

AND if its venting out through ducting make sure that its a nice straight "route" unlike one 1 saw this afternoon!

joehat · Jan 14, 2016

Murdoch said:
AND if its venting out through ducting make sure that its a nice straight "route" unlike one 1 saw this afternoon!

Cheers for advice

Geordie Spark · Jan 14, 2016

Murdoch said:
AND if its venting out through ducting make sure that its a nice straight "route" unlike one 1 saw this afternoon!

AND if it's running through the roof space make sure it's well insulated against the cold and fit a Condensation Trap.

NDG Elecs · Jan 14, 2016

Geordie Spark said:
AND if it's running through the roof space make sure it's well insulated against the cold and fit a Condensation Trap.

Spot on. And also for long runs of ducting consider using rigid ducting and a centrifugal fan.

Geordie Spark · Jan 14, 2016

TheGayOwl said:
Spot on. And also for long runs of ducting consider using rigid ducting and a centrifugal fan.

Definitely, and make sure it slopes slightly downwards so's condensate runs downwards towards the outlet and to the outside of the building.

NDG Elecs · Jan 15, 2016

Geordie Spark said:
Definitely, and make sure it slopes slightly downwards so's condensate runs downwards towards the outlet and to the outside of the building.

Aye, I forgot that point Geordie! Did a thorough job last summer in a house, approx 10m run all in all, rigid inclined ducting, all then insulated, two centrifugals with back draught shutters all over the place. All had been fine til one of the fans failed. Bloody typical, it's a fairly straight forward swap, but loft access is a swine....

Here's a really dull photo of part of it!

[ElectriciansForums.net] Extractor fan comparison

Geordie Spark · Jan 15, 2016

TheGayOwl said:
Aye, I forgot that point Geordie! Did a thorough job last summer in a house, approx 10m run all in all, rigid inclined ducting, all then insulated, two centrifugals with back draught shutters all over the place. All had been fine til one of the fans failed. Bloody typical, it's a fairly straight forward swap, but loft access is a swine....

Some folks have all the luck!! :sailor:

Lucien Nunes · Jan 15, 2016

for long runs of ducting consider using rigid ducting and a centrifugal fan

Definitely. I use the multi-stage type as in the pics below. Excellent performance even with long runs of ducting and they last forever, but they are expensive and you need 3-phase.

hightower · Jan 15, 2016

Lucien Nunes said:
Definitely. I use the multi-stage type as in the pics below. Excellent performance even with long runs of ducting and they last forever, but they are expensive and you need 3-phase.

View attachment 31220 View attachment 31221

He should have room for one or two of those in the loft space above the bathroom.... :rofl: