This just turned up in the post box:
Should reduce my 'leccy bills this summer, hopefully.
It's a tiny box ~3/4 the size of a CD box.
Looks very easy to set up.
I've searched through the forum and found some problems which sound similar to mine, but not exactly.
I have a 156 2.0 (2001) and there is a problem with the intensity of the fan, whether air con or heating.
Basically, most of the time, even with the fan selector at '4' there is hardly any...