OK I have trawled the various DIY outlets in my area and cannot seem to find exactly what I need.
The Cooker Hood Extractor adaptor that is supplied with my hood is here:
The dimensions seem to be non standard, well at least for all the various hood extractor bits that I can find anyway.
The external dia is 118mm and the internal dia is 115mm.
All the extractor supplies that I can find are based around 100 or 125mm.
My extractor will be routed directly through an external brick cavity wall.
Most Flexi hose is 100mm or 125mm.
What I need to know is:
1. Do I or do I not need to sleeve the hole in the cavity, if so what with.
2. Most ducting seems to come in 100mm or 125mm sizes, my adaptor is neither, 125mm is slightly large for my extractor adaptor but will dropping to 100mm cause a problem?
3. Wickes and B&Q supply an Easyfix wall duct which comes in 100mm and 150mm flavours here: http://www.wickes.co.uk/Easyfix-Wall-Duct/invt/199812
is this something I should use although it would seem that it is designed for an extractor to be bolted directly to it.
4. Any idea how the above fixes to the wall it comes with 2 x screws on either end.
5. Wickes also supply a 100mm x 320mm plastic sleeve that could be used to sleeve the hole. I had a play in the shop and it seems to fit nicely onto an outside wall vent, I could use it with some sort of a coupler at the other end to fit the flexi hose onto with a couple of jubillee clips.
5. If I fit the sleeve above the 100mm flexi hose is to large to run through it?
6. The only piece of kit that I could find that fits snug with my extractor adaptor is a reducer that is supplied with a DESIGN AIR kit supplied by B&Q but the reducer is for something else. It comes with an external vent, a 1.5m 125mm flexi hose, 2 x Jubilee clips and couple of adaptors.
Am I making a simple job very difficult!!!