In article ,
"ARWadworth" writes:

"Andrew Gabriel" wrote in message
...
In article ,
Mike Barnes writes:
In uk.d-i-y, jgharston wrote:
I'm planning on installing a fan to create an active
through-draft through the house. Should it be mounted
to pull air into the house or pull air out of the house?

pedant
However you mount it, it will do both. Air will either flow in through
the fan and out through open doors, windows, and other apertures, or the
other way round.
/pedant

I think the main issue would be the outside air coming in - you'd
probably prefer not to have that concentrated near the fan. So "out"
would be the best choice.

Probably want to exhaust the air on the upstairs side facing
the sun, and the coolest air to draw in is likely to be on
a downstairs side away from the sun or north facing.

In the summer, I replace my loft hatch with one which has a
10" vent-axia extractor fan, which serves both to extract
the hot air from upstairs, and to help cool the extremely
hot air in the attic.

Let me check I have got this correct.

You have a 10" fan in the loft hatch to blow air (from the landing I
presume) into the loft. This sounds OK for my house. Did you need to make
any extra vents in the loft?

No - it's got vents around the soffits. It would probably
work much better with a vent at the apex, but there isn't
one and that would be hard to implemnt.

The original aim was to keep the loft cooler, and it probably
manages to knock some degrees off. It was 36C up there
today at 2pm -- it would probably have been something well
over 40C without it.

--
Andrew Gabriel
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