A Non-Listed hood has the advantage of not having to be manufactured to a specific set of length, height and/or depth dimension as well any specific geometric shape depicted in the manufacturer's hood listing. Therefore a Non-Listed hood can be made in any combination of size and/or shape as long as it meets the requirements of the code. This flexibility can be an advantage when things such as columns, beams or other building conditions dictate such things notches, irregular shapes or the position of the exhaust plenum in the CKV hood.
