These are designed specifically for Asian style cooking, the western style range hood from Home Depot and Lowes just don’t have the suction power to deal with it. We just moved to a new house, at the last house, we installed PacAir fan that was rated at 960CFM, it did its job but it was very noisy at full power, we could not carry out normal conversation when the fan is running. FOTILE JQG7501 is much quieter than PacAir and sucks fumes better than PacAir. The customer support team of Fotile did great job to coordinate the installation. The installation team did a great job as you can see they are fearless, LOL. Overall we are very happy with the whole experience buying/install the FOTILE JQG7501. BTW, the hood can exhaust from both top and back, but by exhausting from the back, the efficiency will suffer, so we decided to go with the most efficiency/expensive/proper way of installation. So far as good.