We have stored our ultra-low temperature freezers in rows close to the exhaust.
As you know if you’ve ever stood next to one (especially in a small room) ultra-low temperature freezers generate a lot of heat. This heat is typically dissipated into the room, causing the AC to work harder than it would otherwise need to. By putting these freezers in rows the heat is concentrated in one place, and by putting them next to the exhaust, the concentrated heat is more quickly and easily removed from the room.
For more information about how to arrange ultra-low temperature freezers in an energy-efficient manner, please click here.