RE: Neat ideas for Toilet Ventilation - Motion Detection

["Don McAllister" <donmc@xxxxxxx>]

Ahem... "Motion" detection !!! Think about it :-)

> -----Original Message-----
> From: Chris Langridge [mailto:chrisl@xxxxxxx] 
> Sent: 15 September 2002 08:08
> To: 'ukha_d@xxxxxxx'
> Subject: [ukha_d] Neat ideas for Toilet Ventilation - Motion
Detection=
> 
> 
> There's a motion detection question at the end of this...
> 
> I wonder if we've ever had a thread about PanFans or 
> Ventalus? Both of these systems draw odours directly from the 
> toilet bowl. A friend has a Ventalu and swears by it - 
> however they are a bit pricy at =A3300 per install - also they 
> require a special ducted seat. The PanFan appeals more 
> becuase it is simply an inline fan which can be retrofitted 
> into existing insatallations. It works by drawing air through 
> overflow passage. The PanFan, which is cheap, is also an 
> obvious candidate for incorporation into a HA control system like
HV.<=
BR>
> 
> PanFan do sell an IR sensor to go with their kit. It detects 
> presence in the 'vicinity of the toilet area' and kicks the 
> fan on. I'll find out the price of this controller tomorrow - 
> but I was thinking that HV might do a more reliable and 
> flexible job using a more 'standard' motion detector.
> 
> So the question is:
> What kind of detection system is likely to be most effective. 
> It has to be near the toilet bowl, otherwise the fan will go 
> on when someone is brushing their hair, or having a bath. I 
> have two rooms I wanna use this for - a WC only downstairs 
> and a bathroom upstairs.
> 
> A pressure switch in the loo seat was one idea - but I 
> suspect that this will be unhygenic. 
> 
> As the cystern in both rooms is boxed in with stud work, I 
> would have though that a PIR sensor set low in this stud work 
> may work nicely. It needs to detect the back of one's calf at 
> close range (ie when you're sitting on the john), and ignore 
> people in the rest of the bath room. 
> 
> The other option might be some kind of beam break system like 
> you see in Mission Impossible.
> 
> Any ideas?
> 
> 
> Chris
> 
> 
http://www.wave.co.nz/~p=
anfan/case.htm
http://www.ventalu.co.uk/ind=
ex.htm


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