bathroom extractor fan

[The Medway Handyman]

[John]

I can't really see why a Centrifugal fan is going to be any better. The specs give the data you need to make comparisons.

[Huge]

Axial fans don't work well down a long exhaust vent, because the air in the vent tends to rotate.

[Owain]

You probably have, in a shorter version.

Low pressure axial fan

Pressure centrifugal fan of the various types

[benpost]

hi, well it seems like i need a decent centrifugal fan to help the problem as the ducting is about 4metres long and i dont think the axial fan is sending the air down with enough force. i would like to buy on ebay as i have paypal funds and just wondered whether any of these would be ok as i'm not that sure what i'm looking for. the current fan runs off a red and black wire and powers on when the light is switched on. i'm not sure if its low voltage but i doubt it as it only a cheapy fan (greenwood airvac ax100-b) cheapest one but unbranded?

make as i have but the correct model? axia: advice appreciated and i will update on the progress once i get one! thanks guys

[benpost]

hi just wondered if anyone knows if this fan is any good it seems quite cheap, do you get what you pay for , should i be paying more?

[John]

> thanks

This is Axial

[benpost]

how do you know - from the picture?

bad advertising then as it states centrifugal? no wonder its cheap?

erm do you think this ones the one to go for then:

you

[John]

> thank you

See this

[John]

> thank you

Sorry - its appearance makes it appear to be an axial fan - the air being pulled by a propeller device on a shaft driven by a motor - the air moves in line with the axis of the motor.

Centrifugal - the air is flung outwards by a vaned impellor therefore it is travelling at right angles to the axis of the motor and needs a duct arrangement to manage the direction of the air into a duct.

[John]

> thank you