What are the most common ways of introducing make up air into the kitchen?

The most common ways of introducing make up air into the kitchen are:

1. through the CKV hood,
2. through perforated supply plenums either mounted to the CKV hood or in the ceiling around the CKV hood
3. through ceiling diffusors located in the general are of the CKV hood
4. through the buildings HVAC system
5. through a combination of 1, 2, 3 & 4