Forced convection cooling uses fans or blowers to actively move air through your rack—helping push hot air out and pull cool air in. Fans can be placed at the top, back, or within the rack to align with the front-to-back airflow of most servers. Preferably, place the fan unit inside the rack at the top. Top View: The fans are on the inside of the server rack, precisely near the. Making a DIY server rack setup is an economical method to handle your {hardware}, however overheating stays a vital problem. 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. Managing that heat through efficient server rack cooling is essential not just for performance but for longevity and reliability.