Shower fan switch

[brian3222]

Hi, any advise to a keen DIYer would be appreciated.

I have fitted a shower cubicle in the corner of my bathroom which measures approx 2.4 by 2.5m. I want to fit an extractor fan above the shower to pull the steam away during showering, the fan I was going to fit to the ceiling almost above the shower. I don't want a fan which comes on when the light is turned on, only when manually turned on when the shower is in use. I am therefore thinking about a wall plate switch to turn it on and off when needed. The switch would be located just outside the cubicle. With a 20 or 30 minute delay on the switch all that would really be needed would be a button to activate the shower then it would run until the delay runs out. Does such a switch exist for a bathroom? For the isolator I could fit it to the ceiling or can the isolator be located in the roofspace above the bathroom? Does the fan switch need to be a pull-cord or is a rated wall plate version available?

Thanks guys.

 

[brian3222]

I guess what I am looking for is a wall mounted momentary switch to suit the extractor fan.

 

[riveralt]

Why don't you just buy a shower with a timer and wire it to a normal rocker switch or switched fused connection unit located outside the bathroom zones.

 

[brian3222]

Hi riveralt,
What is a shower with a timer? Mine ia a a remote controlled mixer shower on a high pressure system not an electric shower, if that matters.

I'm thinking of a wall mounted button (momentary switch) to activate the time-delayed extractor fan. Isolator switch in the roof space.
[/img]

 

[riveralt]

Hi riveralt,
What is a shower with a timer? Mine ia a a remote controlled mixer shower on a high pressure system not an electric shower, if that matters.

I'm thinking of a wall mounted button (momentary switch) to activate the time-delayed extractor fan. Isolator switch in the roof space.
[/img]

Yes sorry about that - too earlier in the morning or too late at night......
I was or should have been talking about your extractor fan.

The normal approach would be to utilise the extractor fan with a timer linked to a standard switch through either an fused connection unit and/or a three pole isolator - once the you turn the switch off your fan will continue to run for the preset time.
Cannot see any value is adding a 'momentary switch' other than it costing more to provide the same results.

 

[JohnW2]

The normal approach would be to utilise the extractor fan with a timer linked to a standard switch through either an fused connection unit and/or a three pole isolator - once the you turn the switch off your fan will continue to run for the preset time. Cannot see any value is adding a 'momentary switch' other than it costing more to provide the same results.

Agreed that would be the normal approach. I suppose the potential 'value' of adding a momentary switch (about £3, I think) is that it removes the need to remember to switch the fan off (assuming it's manually controlled by a 'standard switch', rather than lights-activated). As you say, either way the MI will probably call for a 3A FCU, if not also a 3-pole isolator.

Kind Regards, John