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 ?