I once owned a house where my bedroom got insanely hot in summer.
I had one of those small air fresheners which is basically a fan
sucking air up through the base where there is a perfumed filter.

I chopped the legs and filter assembly off bottom of the
freshener, leaving a fan mounted in a plastic cylinder.

I cut a hole in the bedroom ceiling, slightly smaller than unit,
and mounted the unit above it in the loft. This was sealed to the
upper surface of the plaster board with filler foam all round the
outside. The internal switch was run out to a ceiling pull
switch. I powered it from the lighting circuit - a bit naughty,
but I didn't know any better in those days and it was a very
low-power device anyway so no harm done.

I would run this all day in hot weather, venting air into the
loft to combat heat build up, and all night too of course.

The fan was very quiet - you could barely tell it was on.

This system was extremely effective.

For the internal face of the ceiling I adpated a car speaker
grille to provide a good cosmetic appearance. It collected dust
and needed brushing off now and again - v. important, or the fan
motor might start to fry eventually with the obvious fire risk.

In the winter I fitted a cover over the grille to prevent hot air
escaping.

W.



"Gnube" wrote in message
...
On Tue, 15 Jul 2003 01:00:54 +0100, "IMM"
wrote:

Some US homes have a loft extract fans operated by a
thermostat. When hot
during the day, it extracts heat and replaces hot air with
cooler outside
air. During the night it cools the loft right down for the
coming hot day.
Very effective.

If just blowing the house air into to loft would be good enough
to get
started, there's those square type 20" fans you can get and
then a
spare loft hatch (mdf board?) with that fan loaded into it
might be an
interesting experiment to try to see if it's worth following up
with
better suited kit if needed.

Sure sounds intriguing! Easy enough to swap into place on
hotter days
I'd guess - or just for the season maybe?

Take Care,
Gnube
I don't want to win the lottery I just want to win a barn full
of seasoned timber! ;O)