Abstract: A Computer Room Air Handler (CRAH) Unit conditions and provides cooling air to a first zone. A second zone collects return air from the first zone, where multiple servers are positioned between the first zone and the second zone such that air heated by the servers is pushed into the second zone. The first zone is bound from the second zone by one or more racks housing the servers and insulating materials in an area between each server to prevent the cooling air in the first zone from mixing with the return air in the second zone. A third zone, representing a remaining area of the server facility, is maintained at a predefined temperature, where the temperature is higher than a temperature of the first zone and lower than a temperature of the second zone.