Product review (5 stars): Better than what we had on our double wide modular ...
Better than what we had on our double wide modular home for a stove fan vent. works way better. I did remove the plastic damper  that was installed in the inside vent cover next to the fan because this one has a metal one. 50 % improved air flow. Now if I can find a better fan or faster motor I believe I'll get 100% more sucking power.
best thing is "No more false fire alarm going off"