... a basic home-centre style range hood over the gas range in our kitchen. ...
I have yet to find an over the stovetop vent hood that is actually excellent. Even if the lighting control was well done, the fan noise is probably an order of magnitude louder than desirable.
Three speeds; Loud, louder, and at the loudest setting modest actual airflow.
My last house I removed the built-in noisy fan from the range hood housing (it was
marketed as a high end
quiet model) and instead ducted it to a attic mounted
Fantech exhaust fan. Routed through a
Fantech inline silencer unit (rated for kitchen exhaust) between fan and range hood (with a length of flex ducting to limit vibration transmission). Fan exhaust was through the roof with a weather shroud, but could also have been eave vented.
The result was circa 600CFM exhaust flow yet one could speak in normal tones while standing right in front of the cooktop, with the fan on high.
Excellent air flow and visitors standing in the kitchen often were not aware the fan was running, let alone on high.
I forget whether I used the 8XL or 10XL inline fan for that install. Worked very well and I would do something similar again. Buy the range hood for the aesthetics and lighting, bin the supplied fan and remote mount a 'real' exhaust fan.