My under-cabinet microwave/range hood combo recently died, so I replaced it with a 900 CFM range hood, hoping it would do a much better job removing cooking odors and smoke.
I've only been using it for three days, but so far I'm not very impressed. Cooking odors still linger in the kitchen, and the airflow doesn't seem nearly as strong as I expected for a 900 CFM unit.
I tried the paper towel test. The paper will stick to the baffle filter if I place it directly against it, but the hood won't pull it up from even a short distance away. I'm not sure if that's a realistic expectation or not.
This is how the vent is currently installed. The exhaust box was built by the contractors when the over-the-range microwave was installed; I only added some additional foil tape to seal it better. Should I replace this setup with a round flexible duct instead?
Also, when the hood is running at full speed, the exterior wall vent only opens slightly (maybe about 15 degrees). I would have expected it to swing fully open, closer to 90 degrees.