There must be ventilation holes located elsewhere on the cabinet, preferably towards the bottom to act as an air intake. Using fans to push air out will cause negative or lowered pressure within the cabinet. All ventilation fan systems should contain an intake and an exhaust variable, which can be fans or ventilation holes. Electronics such as. Wall-mounted network cabinets from manufacturers like Xianghe Tianhao Metal Products Co. How do I mitigate airflow & heat inside the. So I am currently designing a plan to ventilate an enclosed av cabinet. The cabinet already has some shelves built in that have space cut out of the back for wire management. After all, sealing these gaps (both within and along the sides of cabinets) often provides the greatest return on investment of any airflow management effort, both.