Product review (1 stars): Really frustrating, and I returned it.
My electrician and I were unable to install it in a ductless application under a 30" cabinet. The manual was basically useless, and this was not a DIY project, even with a smart guy holding my hand. I'm not sure what other parts we should have purchased, but I am giving up and returning it. After the frustration of searching online to find a duct-free low profile exhaust fan to fit in a very small, low-ceilinged kitchen, I'm just going to opt for opening a window when I cook.