Speaking of factors that influence the capture capacity of a hood in a professional kitchen, there is one that we may define as counterintuitive.
I’m talking about the presence of shelving.
It has been proven that they do not negatively influence the work of extracting the fumes when placed between the equipment and the hood. Neither that they are rectangular, nor tubular.
Indeed, there is more: an experiment even proved that the presence of tubular shelving above an open-range gas cooker actually improved the capture performance, albeit barely perceptibly (HERE).
What do we get from this?
Well, first of all, the most obvious consideration: if needed, install a tubular shelving without worrying about making the work of the hood more difficult.
And also, always rely on expert technicians: there are many things that those who are not in this sector may not know!
And rely on a manufacturer of quality hoods: Aluminox, for example!