I'm looking at two models on screwfix and apart from the dimensions and a 10
pounds price difference, I can't see whether one is better than the other.
The extraction rates and noise levels are the same. The links a

125mm
http://www.screwfix.com/app/sfd/cat/...32488&ts=04052

100mm
http://www.screwfix.com/app/sfd/cat/...04077&id=25652

I've read the specs several times and can't see what the difference is. Is
there any point in getting the more expensive one?

And on the subject, I was thinking abot replacing the main light, an
unnatractive fluorescent strip, and putting in downlighters instead.
Something like
http://www.screwfix.com/app/sfd/cat/...04301&id=81219
perhaps. I've lifted a couple of floorboards above the bathroom ceiling and
the ceiling is lath and plaster. Can I fit downlighters in this material?

Thanks for any tips.

Dougie

Dougie Nisbet wrote:

I'm looking at two models on screwfix and apart from the dimensions and a 10
pounds price difference, I can't see whether one is better than the other.
The extraction rates and noise levels are the same. The links a

125mm
http://www.screwfix.com/app/sfd/cat/...32488&ts=04052

100mm
http://www.screwfix.com/app/sfd/cat/...04077&id=25652

I've read the specs several times and can't see what the difference is. Is
there any point in getting the more expensive one?


At a risk of stating the obvious - the difference would appear to be
25mm! If they both are genuinely designed to extract at the same rate
the only obvious difference I can see is that the larger fan will
probably spin a little slower and hence may create a lower pitched sound
than the smaller fan - even if the absolute noise level is the same.

The smaller fan may prove a little simpler to fit since it requires
smaller cut outs and the ducting is narrower.

And on the subject, I was thinking abot replacing the main light, an
unnatractive fluorescent strip, and putting in downlighters instead.
Something like
http://www.screwfix.com/app/sfd/cat/...04301&id=81219
perhaps. I've lifted a couple of floorboards above the bathroom ceiling and
the ceiling is lath and plaster. Can I fit downlighters in this material?

Can't see why not - as long as you can cut a neat enough hole in it, and
the ceiling is not so thick as to prevent the clips on the lights
working correctly you should be fine.

--
Cheers,

John.

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John Rumm wrote:

At a risk of stating the obvious - the difference would appear to be
25mm!

(and ten quid!)

If they both are genuinely designed to extract at the same rate
the only obvious difference I can see is that the larger fan will
probably spin a little slower and hence may create a lower pitched sound
than the smaller fan - even if the absolute noise level is the same.

I wondered about that. It's the only thing I can think off. I'll probably go
for the bigger model since space isn't really a problem.

Dougie

"Dougie Nisbet" wrote in message
...
John Rumm wrote:

At a risk of stating the obvious - the difference would appear to be
25mm!

(and ten quid!)

If they both are genuinely designed to extract at the same rate
the only obvious difference I can see is that the larger fan will
probably spin a little slower and hence may create a lower pitched sound
than the smaller fan - even if the absolute noise level is the same.

I wondered about that. It's the only thing I can think off. I'll probably
go
for the bigger model since space isn't really a problem.

Dougie



It could be a mistake on the Screwfix website. 85m^3perhour sounds correct
for the 100mm fan but I would have expected over 120m^3perhour for the 125mm
fan.

Adam