I bought my home in somerton valley, Trevose,PA When I bought home I have specificity told for range hood exit from home. I have in agreement vent hood to exit of home. Till this year after cooking smell remain in home. So we decided to change the hood which has more cfm. When we remove the old hood, we show no vent behind the hood. Due to this all my cabinets are now sticky. User's recommendation: Do not buy or make sure you get what you want.