Product review (1 stars): finally
Here's my review of this product and my thoughts and fixes. for over a year I have battled this vent hood and spent more time than it deserved . Once I figured it out it's a 5 star vent so why the one star you ask ? because this is america!  just kidding . Poor instructions little online information and help. Vents unless you spend serious cash are noisey  so it's noisey the lamps are also hot . You better make sure you buy and install the proper transition also make sure the  back draft damper isn't binding I removed mine and installed a full proof inline round one . I highly recommend at the end of the install that you make sure the Damper is fully open if not you will have issues . from underneath and filters off turn it on and make sure the flap is all the way open . bad install one side might pull while the other pushes . Do a smoke test I used incense sticks and any blowing is a bad install . Now if you do not want to install an inline damper you might want to trim about 1/16" to 1/8 " off each side of the original damper flapper . Make sure all your joints on your exhaust are sealed. Mine works properly now I gave it the sheet of paper test and it stays plastered to the filters on all speeds and then I did the smoke test and 100% of the smoke pulls in from point of fan inlet to 12" -18" away . Make sure if you use the OEM damper that your transition is at least 1 1/2 " before it tapers . 3 x 10 damper is a square peg in a round hole so you better be sure your square peg is smaller than the round hole is my point. The 3 x 10 exhaust is for space saving into walls not reliability and coupled into round exhaust a design mismatch. armed with the right information I recommend this hood otherwise make sure your hood vent has the round option . For the people that gave it 5 stars for customer service please add any contact information you might have on your review because the rep I spoke to didn't have clue between his exhaust port from a hole in the ground...