On Wed, 17 Sep 2003 07:56:09 +0100, a particular chimpanzee named PoP
randomly hit the
keyboard and produced:

Our house is 8 years old. We have a utility room off the kitchen, with
the door going out to the back garden (normally shut). The gas boiler
is in there with washing machine etc. No other ventilation.

Have the regs changed in recent years to require a mechanical means of
ventilation then?

Yes, in 1995, so your house might have been constructed under the
previous requirements.
--
Hugo Nebula
"You know, I'd rather see this on TV,
Tones it down" - Laurie Anderson