"dg" wrote in message
m...
Your Architect is giving poor advice.

It is important to prevent the grease from reaching the fan and
ducting in the first place.

Grease filters stop the fan getting clogged and thus premature wear,
and prevent grease from getting to the flue in the first place. No
liner is going to prevent built up grease catching fire.

Any set up you decide on, should have cleanable, grease pre-filters
before the fan.

Take that as read. It's a kitchen extractor I'm looking for.

No carbon filters or other filters remove all the grease and over time it
may build up in the flue. Another important point is the steam produced by
cooking. This reacts with the carbons from any old soot and produces an
acid which may leach through the chimney breast and cause brownish stains.
A liner would prevent this. This is well documented on the web.


If non of the manufacturers have a specific model for your purpose,
then a standard cooker extractor box could be adapted.

Anyone know a site that has kitchen extractor boxes without design features
such as a hood?