In our new kitchen plan we will have our cooker in the current unused
chimney stack. I know we need a liner to stop build up of grease causing a
fire hazard. However I finding it hard to find information online about
which extractor will be suitable. All sites seem to selling fully
integrated (into a cupboard), or with chimney hoods, but we don't need a
hood as we are keeping the chimney breast as a feature. We want a powerful
one as this will be a living area too.

Any advice on what we need or other points we may not have considered?

Many thanks
Suzanne