While mesh filters can work when clean, as they accumulate grease and lint they restrict their airflow. The first option is baffled, and given stainless steel as most of these are, they should not have a problem in the dishwasher. The second option hints at being a mesh filter design, and the third is definitely mesh type. Aluminum meshes can be cleaned in the dishwasher (if the detergent is not too caustic) but tend to stain.

CFM is specified for each, but it is unclear whether it is specified for the fan itself, or the assembly. In any case, without open windows, the actual flow will depend on the house leakage versus house pressure versus hood fan performance curve. In many jurisdictions, make-up air (MUA) will be needed via some path. This is a subject unto itself, but searching this forum will raise awareness.

Generally, better capture will result from making the hood wider than the cooking zone. This would require wider versions of the first and third options. The 20-inch depth is smaller than one would want unless all hot plume cooking is performed on the back burners. Wider and deeper become more important if the hood is set high above the cooktop to avoid head bumps. (This should be checked either using stick figures and side view sketches, or mocking up the hood in cardboard.

kas

I'd recommend something like a ZSIE36AS. I can't speak to noise level, but that will have dishwasher safe baffles, 650CFM, is 22" deep and for a 9' ceiling you could mount it 30-34" off the cook surface. I'm 6' and I tell customers for someone my height 32-34" is a good compromise in clearance without losing too much effectiveness. Don't go above that.

Thank you both! Does that zephyr have baffle or mesh filters? Different sites seem to say different things.

And do most of these hoods come with extension duct covers for 9' ceilings? They always say optional for up to 12' but does that mean that a cover for a normal ceiling height is included?