Product review (4 stars): Broan QS230SS
I bought the Broan QS230SS model to replace an older model that broke down after 15 years. It was very important to have the same dimensions to fit in the existing kitchen cabinet space. The new model fits perfectly, the only difference I noticed is that the mounting bracket location is offset by a few millimeters.

This unit has two vents: one that vents into the kitchen and the other to an external duct. If you seal the vent to the kitchen there is almost no odor while the unit is operating at a medium fan setting. Wiring the unit was easy with color coded wires.