My bathroom extractor fan doesn't have anything to stop draughts
coming in when the fan isn't working.

I could get something like:

http://www.discount-electrical.co.uk...hutter&x=0&y=0

but I was wondering why not just get a large soft drinks bottle, cut
some slats in the end and stick some tinfoil strips so they'll open
out but cover the slats when the fan is not in use.

Any thoughts?

--
AnthonyL

Use something like this the blast from the fan opens the flaps to vent when off the flaps shut.

http://www.screwfix.com/p/manrose-sq...lap-vent/13161

Richard

On Mon, 24 Feb 2014 03:56:35 -0800 (PST), Tricky Dicky
wrote:

Use something like this the blast from the fan opens the flaps to vent when off the flaps shut.

http://www.screwfix.com/p/manrose-sq...lap-vent/13161


I should have said it is fitted near the top of the house so an
external fitting is non-trivial. That's why I was looking for
something to fit in-line.

--
AnthonyL

On 24/02/2014 11:13, AnthonyL wrote:
My bathroom extractor fan doesn't have anything to stop draughts
coming in when the fan isn't working.

I could get something like:

http://www.discount-electrical.co.uk...hutter&x=0&y=0

but I was wondering why not just get a large soft drinks bottle, cut
some slats in the end and stick some tinfoil strips so they'll open
out but cover the slats when the fan is not in use.

Any thoughts?

Something like this
http://www.extractorfanworld.co.uk/a...n-15-210-p.asp

I am sure there are cheaper versions.

On 24/02/2014 11:13, AnthonyL wrote:
My bathroom extractor fan doesn't have anything to stop draughts
coming in when the fan isn't working.

I could get something like:

http://www.discount-electrical.co.uk...hutter&x=0&y=0

but I was wondering why not just get a large soft drinks bottle, cut
some slats in the end and stick some tinfoil strips so they'll open
out but cover the slats when the fan is not in use.

Any thoughts?


This will fail sooner or later (more likely, almost immediately) as
aluminium foil is not strong enough.

I love bodges, but this looks like it would be quite difficult to do
well. I don't know what your financial position is, but £4.25 does not
seem an awful lot for a purpose-made device tht will hopefully last a
while.

In article ,
lid (AnthonyL) writes:
On Mon, 24 Feb 2014 03:56:35 -0800 (PST), Tricky Dicky
wrote:

Use something like this the blast from the fan opens the flaps to vent when off the flaps shut.

http://www.screwfix.com/p/manrose-sq...lap-vent/13161


I should have said it is fitted near the top of the house so an
external fitting is non-trivial. That's why I was looking for
something to fit in-line.

I have a Vent-Axia in the bathroom which has a backdraft
excluder on the rear of the fan. It's 12 years old, but I
expect they're still available.

I have another type in another bathroom, which has slats
which open on the front when the fan comes on. It uses a
thermal solenoid (which are slow, but replaced the earlier
versions with a magnetic solenoid which opened with a loud
bang). There are two of these exhausting into a common duct,
so it stops smells from one room being pushed into the other,
although a backdraft excluder in the fans would also work.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Because they won't last very long in an exposed place. That plastic is very
prone to crack.
I saw a wonderful vent-axia some years ago that had a kind of cam driven
Louvre that ran from the fan motor when started and closed when you switched
it off. Sorry did not take much notice at the time, but it was on one of
those little displays that Children love to play with.

I recall it was not cheap however..
do they still exist or were they just another thing far to complicated to
last past the warranty?
grin
Brian


--
From the Sofa of Brian Gaff Reply address is active
"AnthonyL" wrote in message
...
My bathroom extractor fan doesn't have anything to stop draughts
coming in when the fan isn't working.

I could get something like:

http://www.discount-electrical.co.uk...hutter&x=0&y=0

but I was wondering why not just get a large soft drinks bottle, cut
some slats in the end and stick some tinfoil strips so they'll open
out but cover the slats when the fan is not in use.

Any thoughts?

--
AnthonyL

In article ,
"Brian Gaff" writes:
Because they won't last very long in an exposed place. That plastic is very
prone to crack.
I saw a wonderful vent-axia some years ago that had a kind of cam driven
Louvre that ran from the fan motor when started and closed when you switched
it off. Sorry did not take much notice at the time, but it was on one of
those little displays that Children love to play with.
I recall it was not cheap however..
do they still exist

Very common, but they use thermal (slow acting) solenoids now.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]