Hi mike,
You can have a recirculating system but you just need a separate fan / ventilator in the room. Like a vent axia. I have a document to help advise you if you want.
The Pure is a 4 zone induction cooktop extractor and has superseded the BORA Basic BI.
If you require more than 4 zones then it will be the BORA Basic BFI . This will be then superseded around March next year for the X Pure.
Just briefly the Pure or X Pure is quieter, has a better control system , has a minimalist design, grease filter with a integrated drip tray etc
To understand it better.... the Basic has been around for 4-5 years - the Pure is the brand new model. Like buying the brand new iPhone with all the latest tech & features.