"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?

You could have the fan on the inside of a hatch door and a grill the other
side. This can hinge up and be fixed in place when not used. Then have
another "sealed" hatch door on the other side of the hatch and swing this
down for winter use. The best is a permanent fan in the loft and a grill
with an auto sealed damper in the ceiling at the top of the stairs. the two
are connected via ductwork.



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