On Sat, 4 Aug 2007 16:47:16 +0100, a particular chimpanzee, "David
W.E. Roberts" randomly hit the keyboard and
produced:

bought a Manrose 150mm/6" extractor fan from Screwfix to use in the kitchen.

Having finally (after a week of man flu) got round to opening the package I
see that the fan is labelled "For Bathrooms and Toilets".

This is rated at up to 230m3 per hour.

230m^3/hr equates to 63.9 litres/second, which is only just over the
minimum requirement [1] for a kitchen fan of 60 litres/sec (unless
it's in a cooker hood or directly over the hob). Once you start
adding in the resistance of any ducting into that, you could quickly
end up with a fan that might not meet Building Regulations [1].

[1] Assuming this is a new or extended kitchen, otherwise there is no
requirement to meet any particular extract rate.
--
Hugo Nebula
"If no-one on the internet wants a piece of this,
just how far from the pack have you strayed?"