Product review (1 stars): received defective  product and it is hard to uninstall and return,.
The air leaks from the back of the hood so not all air goes through the 8 inch duct pipe. Also the product I received seems being used and returned by someone else because all the screws were in place and some deformation on the duct pipe and minor dent on body. Plus the 8'' duct on top was centered of the hood.  I spent big dollars to hire someone to install it, I am not sure if I would hire a person again to take it off and ask for a replacement from the seller.  One light bulb went off in less than a month of use. The lighting area can get really hot in a few minutes.  My friend bought a same one from a local store and hers works pretty good that is why I order the exact same one. It doesn't worthy the money I paid. I paid 550 for this and even I got 80 dollar refund from amazon for a defective light bulb but I still don't recommend anyone buying this kind of product from here.