RE: Neat ideas for Toilet Ventilation - Motion Detection

["Clive Dilley" <clive.dilley@xxxxxxx>]

This looks like interesting - is there a supplier in the UK? Any idea on price yet?

-----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 £300 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.

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/~panfan/case.htm
http://www.ventalu.co.uk/index.htm


http://www.automatedhome.co.uk
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