Two speed switch for bathroom fan

[David WE Roberts]

Life is complicated :-)

My plan is to have a bathroom fan with a humidistat, a run on timer, and an override switch. I can source the parts to do this.

However when looking at fans I can see that the ones which come up as suitable for my size room are mainly two speed fans. O.K. find a two speed fan switch to add to the list. However I can't seem to locate an IP44 switch which can switch a fan between the two speeds.

I did find

this has a 0,1,2 switch state and I don't really want a switch in the circuit which can disable the fan if switched to the wrong setting.

Anyone have any idea of a suitable switch to use? I just want to switch between low and high speeed, but don't want the switch in the loft or under the ceiling downstairs where it isn't easily accessible.

Cheers

Dave R

[meow2222]

any switch you like plus a capacitor

NT

[rbel]

Just a thought - are you sure that you will need both speeds? When faced with this conundrum I decided to try my Soler & Palau fan out at both speeds - just changing the connection between the high and low speed fan terminals. I soon realised that the fan was so very quiet I could happily run it at the higher speed without the need to use the low speed at all. In your case (from memory you are using the higher capacity TD250) you may find that you only need to use the low speed connection.

-- rbel

[Andrew Gabriel]

Any change you can fix whatever double-spaces all the lines in your followups?

[Andy Burns]

I've been considering blacklisting google groups, with a whitelist of valued posters, some GG users seem to suffer from double line spacing, others seem to suffer from extremely long lines which don't wrap properly on quoting, others seem send perfectly good messages.

I'm wondering do some people take the time to tidy-up their messsages before posting via GG, or is this the difference between old and new GG?

[Colin Stamp]

That switch is for a three-phase fan. I'm guessing yours is single phase.

Assuming the fan just has two alternative live terminals, you'll just need a changeover switch e.g. a two-way light switch. then the challenge is finding one in the right environmental rating that doesn't ming too much...

Cheers,

Colin.

[The Natural Philosopher]

Injection-Info: glegroupsg2000goo.googlegroups.com; So probably not.

[The Natural Philosopher]

That can be the difference between people using different browsers on different platforms.

Macs often dont play nice with some backend code.

[David WE Roberts]

Yes, I was wondering about that - just a ceiling pull switch with two way switching could do. The only problem might be that I'm going to have too many pull switches: Light Fan override Fan high/low. .....it's like a jungle in there ;-)

Also, as rbel says the fans may be very quiet. In which case how do you tell when the fan is on high speed? Neon indicator?

Cheers

Dave R

[David WE Roberts]

Yes - just seems wrong to buy a two speed fan then hard wire it to one speed. I will probably have different setups upstairs and down, as upstairs is a very short run, but downstairs is several metres - from the centre of the house - and may have to go into plastic tubing (100mm soil pipe or equivalent) to avoid loss of efficiency.

Which raises another question - how far along the run do you place the fan? Is it better at pushing or pulling, or should you place it in the middle of the ducting run so it is equal distances from inlet and vent?

Cheers

Dave R

[fred]

That's certainly working for me, I have a soft kill on all GG posts and have to specifically request ones from valued posters. There's so little of value coming from that source that it is only a slight inconvenience.

[meow2222]

I'd love to fix a lot of things with google groups, and some of the idiotic= ally designed products I've had over the years. Maybe start by firing eithe= r the people that designed them or the manager that said no, you cant put a= ny more time into making it work sensibly. But, IRL there are other fish to= fry first.

Every time google messes with its usenet interface, it just gets worse. I s= uspect they use it as an exercise for their newbie programmers.

NT

[rbel]

The diagrams I have seen on the Vent-Axia and Xpelair sites show the fan being placed approximately midway along the ducting.

-- rbel

[rbel]

Whilst the difference in the fan mechanical noise for my TD160 unit is not discernable in the bathroom there is an increase in the air movement noise through the shower vent grille.

-- rbel

[David WE Roberts]

Thanks - useful info.

[John Rumm]

CTRL+R in thunderbird when editing the reply will reformat all the long lines for you.

[John Rumm]

I can see the notice now:

Pull once for light and no fan twice for light and slow fan, three times for light and fast fan four times for no light and slow fan five times for no light and fast fan ...

If your hair points upwards in the shower, then its on fast ;-)

[David WE Roberts]

Flattered that you think I have enough hair to use as a reliable indicator :-)

[John Rumm]

I did not say it was on your head ;-)