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Does anyone have experience with deciding where to vent a kitchen exhaust? We are installing a kitchen on the first floor of our three story/three family brick which would include an exhaust hood and I’m wondering if I should install an exhaust vent right out the back side of the building or if it would be a better idea to use one of the four 6 inch flues that are in our chimney stack. Would exhausting 20-30 feet up one of our chimney flues (if it were lined with venting duct) be too far a climb for all the grease etc.? Would exhausting out the back side of the building be a code violation. Does anyone have any experience with this? Thanks.