Keeping a distance of ≥50cm at the sides and rear of the ULT freezer is another action an end user can take. Doing so provides the space for airflow, allowing the warm air ejected at the rear of the unit to rise and dissipate. To simulate poor spacing the rear of the ULT freezer was pushed flat against the wall with boxes and containers placed on top and on both sides of the freezer.
The image below on the left, poor spacing. Placing a ULT freezer back to back with another is another form of poor spacing was examined separately.