Aisle End Doors – Why Where?
An important element to containment is closing the end of the aisle with a door system. The question most asked is which aisle? The answer lies in the design of the room and the natural property of the air. For the most part, hot exhaust air naturally rises after exhausting from the computer. In most cases the hot air requires partitioning above the rack and into a return plenum. The cold aisle or supply aisle is the area that requires a closed end of aisle. This is because cold air is denser. It tends to pool around the floor. As a result the cold air can spill out from the aisle into the ambient room. Thus the number one use of the aisle end door is the cold aisle.
By containing the cold aisle the IT equipment will draw cold air from a common pool. This will better serve equipment that will vary in its thermal loads.
Dual Sliding Door



The Subzero Engineering Dual Sliding Door is designed to install at the end of the rack row with minimal intrusion to the rack. Simply tilt up, connect to the floor and affix to the top of the cabinet. The door is ready for operation. The no-threshold design is one of the most important features. The all aluminum door supports twin sliding doors that bridge an aisle from 24" to 96" wide. The Subzero Engineering sliding door system is built strong with heavy gauge aluminum. The clear aluminum or black anodized finish complement most rack colors.
Single Sliding Door

The single sliding door is the same door as the dual sliding door except it only has one door. This design works perfectly with situations where there is no room to extend the door to the outside of the cabinet. It can also be fitted with a fixed panel return.
Hinged Doors

The Subzero Engineering Hinged Door System is perfect to fit various places with unique access points.
Strip Doors - Available in Clear or Frosted Vinyl

One low cost option for closing the end of the aisle is the Subzero Engineering strip door. It attaches to the ceiling on the same aluminum track system as does he Rack Hat™ partition system. The fire resistant clear vinyl hangs down from the ceiling to the floor. The strip doors can be used in a variety of applications so as to create a partition and still allow access.

Door Illustrations

Hinged With Return Wall

Strip Door with Rack Hat Partition System

Dual sliding Door with Rack Hat