A friend has made the following request elsewhere, and doesn't use
newsgroups

"we have a small  larder at the back of the kitchen (it used to be the
outside loo). It  has two airbricks for ventilation - one low down that
opens onto the  cool passageway between the houses, the other high up on
the back wall.

In the Summer, it gets too hot, despite insulation. So I'd like to
install a small solar-powered fan to assist with circulating
comparatively cool air in from the passageway. There are a few kits
around, but what I'm really after is an airbrick with a fan in it -
preferably a centrifugal one as it's fit the rectangular shape better.

Does anyone have any knowledge, experience or ideas please? As a default
I'll get a kit and botch the physical interface to the airbrick."

sensible recommendations, anyone ?