In article .com,
wrote:
Just happen to have a copy of the approved plans for my extension to
hand and they specify :-
"Install mechanical ventilation to bathroom & wc to extract at a min
rate of 15l/s switched with light & with min 15 minutes overrun."
The latter is the bit I know I'm going to hate when someone uses the
loo in the middle of the night and a noisy fan kicks in for 15 minutes.
Anybody know whether there is such a thing as a silent fan ? Any
noise seems loud at 3am!
Can you fit a switched supply to the fan so that
it can be overridden at night..?
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