I used this over the range vent for my renovated kitchen because I had only a little space and had to use an outlet. I also do not have the duct but I am planning to do it next Spring. This unit has it all. It could be duct or ductless, has a low noise on speed 1, and is powerful enough on speed 3. Great quality for the money! Make sure to don't damage it during the installation because all these vents are made of thin metal.