The position of the cooking equipment and the inclusion of adjacent back and side walls or the lack thereof can have a significant effect on the amount of exhaust air that is required to obtain full capture and containment. Positioning the cooking equipment with the hottest cooking temperature closest to the center of the hood can reduce exhaust airflow requirements and vice a versa, positioning the cooking equipment with the hottest cooking temperatures closet to the sides of the hood will increase exhaust air flow requirements.

Walls adjacent to CKV can significantly reduce the minimum amount of exhaust airflow that is required to achieve capture and containment. Hoods that are installed against a back wall will generally require 50% less exhaust airflow than hood that are installed in a Island application with no walls.